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Illien F, Bánóczi Z, Sagan S. A QUANTITATIVE METHOD TO DISTINGUISH CYTOSOLIC FROM ENDOSOME-TRAPPED CELL-PENETRATING PEPTIDES. Chembiochem 2024:e202400198. [PMID: 38589287 DOI: 10.1002/cbic.202400198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Revised: 04/01/2024] [Accepted: 04/08/2024] [Indexed: 04/10/2024]
Abstract
Cell-penetrating peptides are known to penetrate cells through endocytosis and translocation. The two pathways are hardly distinguished in current cell assays. We developed a reliable, simple and robust method to distinguish and quantify independently the two routes. The assay requires (DABCYL) 4-(dimethylaminoazo)benzene-4-carboxylic acid- and (CF) carboxyfluorescein-labeled peptides. When the labeled peptide is intact, the fluorescence signal is weak thanks to the dark quenching property of DABCYL. A 10-fold higher fluorescence signal is measured when the labeled peptide is degraded. By referring to a standard fluorescent curve according to the concentration of the hydrolyzed peptide, we have access to the internalized peptide quantity. Therefore, cell lysis after internalization permits to determine the total quantity of intracellular peptide. The molecular state of the internalized peptide (intact or degraded), depends on its location in cells (cytosol vs endo-lysosomes), and can be blocked by boiling cells. This boiling step results indeed in denaturation and inhibition of the cellular enzymes. The advantage of this method is the possibility to quantify translocation at 37°C and to compare it to the 4°C condition, where all endocytosis processes are inhibited. We found that ranking of the translocation efficacy is DABCYL-R6-(εCF)K >> DABCYL-R4-(εCF)K ≥ CF-R9.
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Affiliation(s)
- Françoise Illien
- Sorbonne Université Campus Pierre et Marie Curie, Chemistry, 4 place Jussieu, 75005, Paris, FRANCE
| | - Zoltán Bánóczi
- Eötvös Loránd University, Institute of Chemistry, Faculty of Science,, Pázmány Péter sétány, H-1117, Budapest, HUNGARY
| | - Sandrine Sagan
- Sorbonne Université Campus Pierre et Marie Curie, Chemistry, 4 place Jussieu, 75005, Paris, FRANCE
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2
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Cooper J, Chow JCK, Lichti D. Enhancing Single-Plane Fluoroscopy: A Self-Calibrating Bundle Adjustment for Distortion Modeling. Diagnostics (Basel) 2024; 14:567. [PMID: 38473039 DOI: 10.3390/diagnostics14050567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 02/11/2024] [Accepted: 03/04/2024] [Indexed: 03/14/2024] Open
Abstract
Single-plane fluoroscopy systems with image intensifiers remain commonly employed in a clinical setting. The imagery they capture is vulnerable to several types of geometric distortions introduced by the system's components and their assembly as well as interactions with the local and global magnetic fields. In this study, the application of a self-calibrating bundle adjustment is investigated as a method to correct geometric distortions in single-plane fluoroscopic imaging systems. The resulting calibrated imagery is then applied in the quantitative analysis of diaphragmatic motion and potential diagnostic applications to hemidiaphragm paralysis. The calibrated imagery is further explored and discussed in its potential impact on areas of surgical navigation. This work was accomplished through the application of a controlled experiment with three separate Philips Easy Diagnost R/F Systems. A highly redundant (~2500 to 3500 degrees-of-freedom) and geometrically strong network of 18 to 22 images of a low-cost target field was collected. The target field comprised 121 pre-surveyed tantalum beads embedded on a 25.4 mm × 25.4 mm acrylic base plate. The modeling process resulted in the estimation of five to eight distortion coefficients, depending on the system. The addition of these terms resulted in 83-85% improvement in terms of image point precision (model fit) and 85-95% improvement in 3D object reconstruction accuracy after calibration. This study demonstrates significant potential in enhancing the accuracy and reliability of fluoroscopic imaging, thereby improving the overall quality and effectiveness of medical diagnostics and treatments.
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Affiliation(s)
- Jackson Cooper
- Department of Geomatics Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Jacky C K Chow
- Department of Radiology, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 2T9, Canada
| | - Derek Lichti
- Department of Geomatics Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada
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3
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Kawanishi Y, Kobayashi M, Yasuma S, Fukushima H, Kato J, Murase A, Takenaga T, Yoshida M, Kuroyanagi G, Kawaguchi Y, Murakami H, Nozaki M. Factors Associated With Residual Pivot Shift After ACL Reconstruction: A Quantitative Evaluation of the Pivot-Shift Test Preoperatively and at Minimum 12-Month Follow-up. Orthop J Sports Med 2024; 12:23259671241230967. [PMID: 38414663 PMCID: PMC10898316 DOI: 10.1177/23259671241230967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Accepted: 08/29/2023] [Indexed: 02/29/2024] Open
Abstract
Background Postoperative residual rotatory laxity remains despite improvement in surgical techniques for anterior cruciate ligament (ACL) reconstruction (ACLR). Purpose To evaluate factors associated with residual pivot shift after ACLR by quantitative measurement of the pivot shift before and after surgery. Study Design Case-control study; Level of evidence, 3. Methods A total of 97 patients who underwent primary double-bundle ACLR between June 2016 and March 2021 and underwent surgery to remove staples, with at least 12 months of follow-up evaluation, were enrolled. Quantitative measurements were performed under general anesthesia immediately before ACLR (preoperatively), after temporary fixation of the ACL graft (intraoperatively), and immediately before staple removal (postoperatively). The laxity of pivot shift was assessed using inertial sensors to measure acceleration and external rotational angular velocity (ERAV). Descriptive data were assessed for associations with postoperative acceleration and ERAV in a univariate analysis. A multiple linear regression analysis was performed to identify factors associated with postoperative acceleration and ERAV. Results Anterior tibial translation, acceleration, and ERAV increased from intra- to postoperatively (P < .05). Factors significantly associated with postoperative acceleration were age (β = -0.238; P = .021), lateral posterior tibial slope (PTS) (β = 0.194; P = .048), and preoperative acceleration (β = 0.261; P = .008). Factors significantly affecting postoperative ERAV were age (β = -0.222; P = .029), ramp lesions (β = 0.212; P = .027), and preoperative ERAV (β = 0.323; P = .001). Conclusion Greater preoperative laxity in the pivot shift was the factor having the most significant association with residual pivot shift after ACLR using quantitative measurements under general anesthesia. Younger age, higher lateral PTS, and concomitant ramp lesions were significant predictors of residual pivot shift. These findings can help pre- and intraoperative decision-making regarding whether an anterolateral structure augmentation should be added.
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Affiliation(s)
- Yusuke Kawanishi
- Department of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Mizuho-Ku, Nagoya, Japan
| | - Makoto Kobayashi
- Department of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Mizuho-Ku, Nagoya, Japan
| | - Sanshiro Yasuma
- Department of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Mizuho-Ku, Nagoya, Japan
| | - Hiroaki Fukushima
- Department of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Mizuho-Ku, Nagoya, Japan
| | - Jiro Kato
- Department of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Mizuho-Ku, Nagoya, Japan
| | - Atsunori Murase
- Kasugai Joint & Sports Orthopedic, Pain Clinic, Kasugai, Japan
| | - Tetsuya Takenaga
- Department of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Mizuho-Ku, Nagoya, Japan
| | - Masahito Yoshida
- Department of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Mizuho-Ku, Nagoya, Japan
| | - Gen Kuroyanagi
- Department of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Mizuho-Ku, Nagoya, Japan
| | - Yohei Kawaguchi
- Department of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Mizuho-Ku, Nagoya, Japan
| | - Hideki Murakami
- Department of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Mizuho-Ku, Nagoya, Japan
| | - Masahiro Nozaki
- Department of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Mizuho-Ku, Nagoya, Japan
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4
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Saravi B, Guzel HE, Zink A, Ülkümen S, Couillard-Despres S, Wollborn J, Lang G, Hassel F. Synthetic 3D Spinal Vertebrae Reconstruction from Biplanar X-rays Utilizing Generative Adversarial Networks. J Pers Med 2023; 13:1642. [PMID: 38138869 PMCID: PMC10744485 DOI: 10.3390/jpm13121642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 11/20/2023] [Accepted: 11/23/2023] [Indexed: 12/24/2023] Open
Abstract
Computed tomography (CT) offers detailed insights into the internal anatomy of patients, particularly for spinal vertebrae examination. However, CT scans are associated with higher radiation exposure and cost compared to conventional X-ray imaging. In this study, we applied a Generative Adversarial Network (GAN) framework to reconstruct 3D spinal vertebrae structures from synthetic biplanar X-ray images, specifically focusing on anterior and lateral views. The synthetic X-ray images were generated using the DRRGenerator module in 3D Slicer by incorporating segmentations of spinal vertebrae in CT scans for the region of interest. This approach leverages a novel feature fusion technique based on X2CT-GAN to combine information from both views and employs a combination of mean squared error (MSE) loss and adversarial loss to train the generator, resulting in high-quality synthetic 3D spinal vertebrae CTs. A total of n = 440 CT data were processed. We evaluated the performance of our model using multiple metrics, including mean absolute error (MAE) (for each slice of the 3D volume (MAE0) and for the entire 3D volume (MAE)), cosine similarity, peak signal-to-noise ratio (PSNR), 3D peak signal-to-noise ratio (PSNR-3D), and structural similarity index (SSIM). The average PSNR was 28.394 dB, PSNR-3D was 27.432, SSIM was 0.468, cosine similarity was 0.484, MAE0 was 0.034, and MAE was 85.359. The results demonstrated the effectiveness of this approach in reconstructing 3D spinal vertebrae structures from biplanar X-rays, although some limitations in accurately capturing the fine bone structures and maintaining the precise morphology of the vertebrae were present. This technique has the potential to enhance the diagnostic capabilities of low-cost X-ray machines while reducing radiation exposure and cost associated with CT scans, paving the way for future applications in spinal imaging and diagnosis.
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Affiliation(s)
- Babak Saravi
- Department of Orthopedics and Trauma Surgery, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (S.Ü.); (G.L.)
- Department of Spine Surgery, Loretto Hospital, 79100 Freiburg, Germany; (A.Z.); (F.H.)
- Institute of Experimental Neuroregeneration, Spinal Cord Injury and Tissue Regeneration Center Salzburg (SCI-TReCS), Paracelsus Medical University, 5020 Salzburg, Austria;
- Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA;
| | - Hamza Eren Guzel
- Department of Radiology, University of Health Sciences, Izmir Bozyaka Training and Research Hospital, Izmir 35170, Türkiye;
| | - Alisia Zink
- Department of Spine Surgery, Loretto Hospital, 79100 Freiburg, Germany; (A.Z.); (F.H.)
| | - Sara Ülkümen
- Department of Orthopedics and Trauma Surgery, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (S.Ü.); (G.L.)
| | - Sebastien Couillard-Despres
- Institute of Experimental Neuroregeneration, Spinal Cord Injury and Tissue Regeneration Center Salzburg (SCI-TReCS), Paracelsus Medical University, 5020 Salzburg, Austria;
- Austrian Cluster for Tissue Regeneration, 1200 Vienna, Austria
| | - Jakob Wollborn
- Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA;
| | - Gernot Lang
- Department of Orthopedics and Trauma Surgery, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (S.Ü.); (G.L.)
| | - Frank Hassel
- Department of Spine Surgery, Loretto Hospital, 79100 Freiburg, Germany; (A.Z.); (F.H.)
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Saravi B, Zink A, Ülkümen S, Couillard-Despres S, Wollborn J, Lang G, Hassel F. Automated Detection and Measurement of Dural Sack Cross-Sectional Area in Lumbar Spine MRI Using Deep Learning. Bioengineering (Basel) 2023; 10:1072. [PMID: 37760174 PMCID: PMC10525778 DOI: 10.3390/bioengineering10091072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 07/21/2023] [Accepted: 09/07/2023] [Indexed: 09/29/2023] Open
Abstract
Lumbar spine magnetic resonance imaging (MRI) is a critical diagnostic tool for the assessment of various spinal pathologies, including degenerative disc disease, spinal stenosis, and spondylolisthesis. The accurate identification and quantification of the dural sack cross-sectional area are essential for the evaluation of these conditions. Current manual measurement methods are time-consuming and prone to inter-observer variability. Our study developed and validated deep learning models, specifically U-Net, Attention U-Net, and MultiResUNet, for the automated detection and measurement of the dural sack area in lumbar spine MRI, using a dataset of 515 patients with symptomatic back pain and externally validating the results based on 50 patient scans. The U-Net model achieved an accuracy of 0.9990 and 0.9987 on the initial and external validation datasets, respectively. The Attention U-Net model reported an accuracy of 0.9992 and 0.9989, while the MultiResUNet model displayed a remarkable accuracy of 0.9996 and 0.9995, respectively. All models showed promising precision, recall, and F1-score metrics, along with reduced mean absolute errors compared to the ground truth manual method. In conclusion, our study demonstrates the potential of these deep learning models for the automated detection and measurement of the dural sack cross-sectional area in lumbar spine MRI. The proposed models achieve high-performance metrics in both the initial and external validation datasets, indicating their potential utility as valuable clinical tools for the evaluation of lumbar spine pathologies. Future studies with larger sample sizes and multicenter data are warranted to validate the generalizability of the model further and to explore the potential integration of this approach into routine clinical practice.
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Affiliation(s)
- Babak Saravi
- Department of Orthopedics and Trauma Surgery, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (S.Ü.); (G.L.)
- Department of Spine Surgery, Loretto Hospital, 79100 Freiburg, Germany; (A.Z.); (F.H.)
- Institute of Experimental Neuroregeneration, Spinal Cord Injury and Tissue Regeneration Center Salzburg (SCI-TReCS), Paracelsus Medical University, 5020 Salzburg, Austria;
- Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA;
| | - Alisia Zink
- Department of Spine Surgery, Loretto Hospital, 79100 Freiburg, Germany; (A.Z.); (F.H.)
| | - Sara Ülkümen
- Department of Orthopedics and Trauma Surgery, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (S.Ü.); (G.L.)
| | - Sebastien Couillard-Despres
- Institute of Experimental Neuroregeneration, Spinal Cord Injury and Tissue Regeneration Center Salzburg (SCI-TReCS), Paracelsus Medical University, 5020 Salzburg, Austria;
- Austrian Cluster for Tissue Regeneration, 1200 Vienna, Austria
| | - Jakob Wollborn
- Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA;
| | - Gernot Lang
- Department of Orthopedics and Trauma Surgery, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (S.Ü.); (G.L.)
| | - Frank Hassel
- Department of Spine Surgery, Loretto Hospital, 79100 Freiburg, Germany; (A.Z.); (F.H.)
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Jankhotkaew J, Casswell S, Huckle T, Chaiyasong S, Phonsuk P. Quantitative tools and measurements for assessing the implementation of regulatory policies in reducing alcohol consumption and alcohol-related harms: A scoping review. Drug Alcohol Rev 2023; 42:157-168. [PMID: 36097414 PMCID: PMC10087297 DOI: 10.1111/dar.13543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 08/08/2022] [Accepted: 08/19/2022] [Indexed: 01/10/2023]
Abstract
ISSUES Implementation of alcohol control policy is a global priority as alcohol contributes to negative individual health and societal impacts. However, there are no available reviews that comprehensively provide tools and measurements for assessing the implementation of alcohol control policy. This study reviews tools and measurements for assessing alcohol policy implementation. Policies considered include alcohol pricing and taxation, alcohol marketing control, physical availability control and drink-driving policy. APPROACH We conducted a scoping review from Scopus, Web of Science and the World Health Organization's website. We included studies on policy implementation for the four most effective prevention policies published worldwide between 2000 and 2021. KEY FINDINGS The search yielded 11,654 articles and these were narrowed down to 39 included studies. Of these 39 studies, almost half assessed the implementation of a drink-driving policy (n = 19), followed multipolicy (n = 12) and physical availability control (n = 8). There was no single study assessing policy implementation of pricing and taxation or alcohol marketing control. The majority of the studies were conducted in high-income countries (n = 31). Globally, there is no standardised tool or guidelines for measuring the policy implementation of these four policies. The tools for measuring policy implementation mostly focused on a single policy, and few covered multiple policies. IMPLICATIONS We recommend developing standardised tools and measurements to monitor policy implementation across multiple policies at country levels. CONCLUSION This review highlighted a lack of comprehensive and standardised tools to assess policy implementation and the limited number of studies on alcohol policy implementation in low- and middle-income countries.
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Affiliation(s)
- Jintana Jankhotkaew
- SHORE & Whariki Research Centre, Massey University, Auckland, New Zealand.,International Health Policy Program, Ministry of Public Health, Nonthaburi, Thailand
| | - Sally Casswell
- SHORE & Whariki Research Centre, Massey University, Auckland, New Zealand
| | - Taisia Huckle
- SHORE & Whariki Research Centre, Massey University, Auckland, New Zealand
| | - Surasak Chaiyasong
- International Health Policy Program, Ministry of Public Health, Nonthaburi, Thailand.,Alcohol and Health Promotion Policy Research Unit and Social Pharmacy Research Unit, Faculty of Pharmacy, Mahasarakham University, Maha Sarakham, Thailand
| | - Payao Phonsuk
- Department of Health Education and Behavioral Sciences, Faculty of Public Health, Mahidol University, Bangkok, Thailand
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Kishi K, Ichimura A, Shuai Z, Otsuka Y, Morozumi T, Yamada K. Alginic Acid Beads Containing Fluorescent Solvatochromic Dyes Display an Emission Color Response to a Cationic Surfactant. Polymers (Basel) 2022; 14:4649. [PMID: 36365641 PMCID: PMC9655048 DOI: 10.3390/polym14214649] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 10/27/2022] [Accepted: 10/28/2022] [Indexed: 02/06/2024] Open
Abstract
Lipophilic fluorescent dyes can be employed as sensors for surfactants present in concentrations above the critical micellar concentration (CMC) where the dyes are monodispersed in micelles. However, the surfactant concentration range over which these dyes are effective is narrowed because by the sigmoidal nature of their responses. To overcome this limitation, we developed a novel sensor material comprised of a labeled fluorescent solvatochromic dye covalently bonded to alginate gel, which is known to strongly adsorb cationic surfactants. We hypothesized that the dye-alginate conjugate would undergo fluorescent color changes in response to binding of surfactants which alter the polarity of the surrounding environment. Indeed, addition of the representative cationic surfactant, cetylpyridinium chloride (CPC), to an aqueous solution of the alginate conjugated fluorescent solvatochromic dye leads to a visible fluorescent color change when the concentration of CPC is below the CMC. The average values of the color appearance parameter, referred to as a hue, of light emitted from gels, calculated by analysis of fluorescence microscopy images using ImageJ software, were found to be approximately linearly dependent on the concentration of CPC encapsulated in the alginate-fluorescent dye complex. This finding shows that absorbed CPC can be quantitatively determined over a wide concentration range in the form of simple fluorescence wavelength or visible responses.
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Affiliation(s)
- Kazuki Kishi
- Division of Materials Science, Graduate School of Environmental Science, Hokkaido University, Sapporo 060-0810, Hokkaido, Japan
| | - Amane Ichimura
- Division of Materials Science, Graduate School of Environmental Science, Hokkaido University, Sapporo 060-0810, Hokkaido, Japan
| | - Zhang Shuai
- Division of Environ Science, Graduate School of Environmental Science, Hokkaido University, Sapporo 060-0810, Hokkaido, Japan
| | - Yu Otsuka
- Division of Environ Science, Graduate School of Environmental Science, Hokkaido University, Sapporo 060-0810, Hokkaido, Japan
| | - Tatsuya Morozumi
- Hokkaido Institute of Public Health, Sapporo 060-0819, Hokkaido, Japan
| | - Koji Yamada
- Division of Materials Science, Faculty of Environmental Earth Science, Hokkaido University, Sapporo 060-0810, Hokkaido, Japan
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Maruyama S, Tatsuo S, Tatsuo S, Iida S, Tsushima F, Ide S, Kakeda S. Quantification of the Intrinsic T1 and T2 of Heschl's Gyri with MR Fingerprinting. Magn Reson Med Sci 2022; 22:95-101. [PMID: 35296588 PMCID: PMC9849413 DOI: 10.2463/mrms.mp.2021-0144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
PURPOSE The human primary auditory cortex is located in the Heschl's gyrus (HG). To assess the intrinsic MR property in the gray matter of the HG (GM-HG) with T1 and T2 values using a commercially available MR fingerprinting (MRF) technique. METHODS The subjects were 10 healthy volunteers (with 20 HGs; mean age, 31.5 years old; range, 25-53 years old). Coronal T1 and T2 maps were obtained with commercially available MRF using a 3-Tesla MR system. Two radiologists measured the T1 and T2 values of the GM-HG, the GM in the superior temporal gyrus (GM-STG), and the GM in the middle temporal gyrus (GM-MTG) by drawing a ROI on coronal maps. RESULTS For both radiologists, the mean T1 and T2 values of the GM-HG were significantly lower than those in the GM-STG or GM-MTG (P < 0.01). The interobserver reliability using the intraclass correlation coefficients (ICC) (2,1) showed strong agreement for the measurement of the T1 and T2 values (ICCs =⃥ 0.80 and 0.78 for T1 and T2 values, respectively). CONCLUSION The T1 and T2 values on MRF for the GM-HG were lower than those for the GM-STG and GM-MTG, likely reflecting a higher myelin content and iron deposition in the GM-HG. Quantitative measurements using the MRF can clarify cortical properties with high reliability, which may indicate that MRF mapping provides new insights into the structure of the human cortical GM.
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Affiliation(s)
- Sho Maruyama
- Department of Radiology, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori, Japan
| | - Sayuri Tatsuo
- Department of Radiology, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori, Japan
| | - Soichiro Tatsuo
- Department of Radiology, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori, Japan
| | - Saya Iida
- Department of Radiology, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori, Japan
| | - Fumiyasu Tsushima
- Department of Radiology, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori, Japan
| | - Satoru Ide
- Department of Radiology, University of Occupational and Environmental Health, School of Medicine, Kitakyushu, Fukuoka, Japan
| | - Shingo Kakeda
- Department of Radiology, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori, Japan,Corresponding author: Department of Radiology, Hirosaki University Graduate School of Medicine, 5, Zaifu-cho, Hirosaki, Aomori 036-8562, Japan. Phone: +81-172-33-5103, Fax: +81-172-33-5627, E-mail:
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9
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Hung ND, Dung LT, Huyen DK, Duy NQ, He DV, Duc NM. The value of quantitative magnetic resonance imaging signal intensity in distinguishing between spinal meningiomas and schwannomas. Int J Med Sci 2022; 19:1110-1117. [PMID: 35919813 PMCID: PMC9339414 DOI: 10.7150/ijms.73319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 06/07/2022] [Indexed: 12/02/2022] Open
Abstract
Background: Prior studies have suggested a number of the subjective visual characteristics that help distinguish between spinal meningiomas and schwannomas on magnetic resonance imaging and computed tomography; however, objective quantification of the signal intensity can be useful information. This study assessed whether quantitative magnetic resonance imaging (MRI) signal intensity (SI) measurements could distinguish intradural-extramedullary schwannomas from meningiomas. Methods: From July 2019 to September 2021, 54 patients with intradural-extramedullary tumors (37 meningiomas and 17 schwannomas) underwent surgery, and tumors were verified pathologically. Defined regions of interest were used to quantify SI values on T1- (T1W) and T2-weighted images (T2W). Receiver operating characteristic curve analysis was used to obtain cutoff values and calculate the area under the curve (AUC), sensitivity (SE), specificity (SP), positive predictive value (PPV), and negative predictive value (NPV). Results: Both Maximum (T2max) and mean (T2mean) T2W SI values demonstrated outstanding (AUC: 0.91) abilities to differentiate meningiomas from schwannomas with Se, Sp, PPV, and NPV values of 94.6%, 70.6%, 87.5%, and 85.7%, respectively, for T2max and 81.1%, 88.2%, 93.8%, and 68.2% for T2mean. The maximum SI value on contrast-enhanced T1W (T1CEmax) and the T2W tumor: fat SI ratio (rTF) demonstrated acceptable abilities (AUC: 0.73 and 0.79, respectively) to differentiate meningiomas from schwannomas with Se, Sp, PPV, and NPV values of 94.6%, 70.6%, 87.5%, and 85.7%, respectively, for T1CEmax and 81.1%, 88.2%, 93.8%, and 68.2% for rTF. Conclusions: Quantitative SI values (T2max, T2mean, T2min, T1CEmax, rTF) can be used to differentiate intradural-extramedullary schwannomas from meningiomas.
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Affiliation(s)
- Nguyen Duy Hung
- Department of Radiology, Hanoi Medical University, Hanoi, Vietnam.,Department of Radiology, Viet Duc Hospital, Hanoi, Vietnam
| | - Le Thanh Dung
- Department of Radiology, Viet Duc Hospital, Hanoi, Vietnam.,Department of Radiology, VNU University of Medicine and Pharmacy, Vietnam National University, Hanoi, Vietnam
| | - Dang Khanh Huyen
- Department of Radiology, Hanoi Medical University, Hanoi, Vietnam
| | - Ngo Quang Duy
- Department of Radiology, Ha Giang General Hospital, Ha Giang, Vietnam
| | - Dong-Van He
- Department of Neurosurgery, Viet Duc Hospital, Hanoi, Vietnam
| | - Nguyen Minh Duc
- Department of Radiology, Pham Ngoc Thach University of Medicine, Ho Chi Minh City, Vietnam
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Abstract
The methods of measuring laryngeal elevation during swallowing are time-consuming. We aimed to propose a quick-to-use neural network (NN) model for measuring laryngeal elevation quantitatively using anatomical structures auto-segmented by Mask region-based convolutional NN (R-CNN) in videofluoroscopic swallowing study. Twelve videofluoroscopic swallowing study video clips were collected. One researcher drew the anatomical structure, including the thyroid cartilage and vocal fold complex (TVC) on respective video frames. The dataset was split into 11 videos (4686 frames) for model development and one video (532 frames) for derived model testing. The validity of the trained model was evaluated using the intersection over the union. The mean intersections over union of the C1 spinous process and TVC were 0.73 ± 0.07 [0-0.88] and 0.43 ± 0.19 [0-0.79], respectively. The recall rates for the auto-segmentation of the TVC and C1 spinous process by the Mask R-CNN were 86.8% and 99.8%, respectively. Actual displacement of the larynx was calculated using the midpoint of the auto-segmented TVC and C1 spinous process and diagonal lengths of the C3 and C4 vertebral bodies on magnetic resonance imaging, which measured 35.1 mm. Mask R-CNN segmented the TVC with high accuracy. The proposed method measures laryngeal elevation using the midpoint of the TVC and C1 spinous process, auto-segmented by Mask R-CNN. Mask R-CNN auto-segmented the TVC with considerably high accuracy. Therefore, we can expect that the proposed method will quantitatively and quickly determine laryngeal elevation in clinical settings.
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Affiliation(s)
- Hyun Haeng Lee
- Department of Rehabilitation Medicine, Konkuk University School of Medicine and Konkuk University Medical Center, Seoul, Korea
| | - Bo Mi Kwon
- Department of Rehabilitation Medicine, Konkuk University School of Medicine and Konkuk University Medical Center, Seoul, Korea
| | | | | | - Jongmin Lee
- Department of Rehabilitation Medicine, Konkuk University School of Medicine and Konkuk University Medical Center, Seoul, Korea
- Center for Neuroscience Research, Institute of Biomedical Science & Technology, Konkuk University, Seoul, Korea
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11
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Holland MD, Morales A, Simmons S, Smith B, Misko SR, Jiang X, Hormuth DA, Christenson C, Koomullil RP, Morgan DE, Li Y, Xu J, Yankeelov TE, Kim H. Disposable point-of-care portable perfusion phantom for quantitative DCE-MRI. Med Phys 2021; 49:271-281. [PMID: 34802148 DOI: 10.1002/mp.15372] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 10/12/2021] [Accepted: 11/05/2021] [Indexed: 12/30/2022] Open
Abstract
PURPOSE To develop a disposable point-of-care portable perfusion phantom (DP4) and validate its clinical utility in a multi-institutional setting for quantitative dynamic contrast-enhanced magnetic resonance imaging (qDCE-MRI). METHODS The DP4 phantom was designed for single-use and imaged concurrently with a human subject so that the phantom data can be utilized as the reference to detect errors in qDCE-MRI measurement of human tissues. The change of contrast-agent concentration in the phantom was measured using liquid chromatography-mass spectrometry. The repeatability of the contrast enhancement curve (CEC) was assessed with five phantoms in a single MRI scanner. Five healthy human subjects were recruited to evaluate the reproducibility of qDCE-MRI measurements. Each subject was imaged concurrently with the DP4 phantom at two institutes using three 3T MRI scanners from three different vendors. Pharmacokinetic (PK) parameters in the regions of liver, spleen, pancreas, and paravertebral muscle were calculated based on the Tofts model (TM), extended Tofts model (ETM), and shutter speed model (SSM). The reproducibility of each PK parameter over three measurements was evaluated with the intraclass correlation coefficient (ICC) and compared before and after DP4-based error correction. RESULTS The contrast-agent concentration in the DP4 phantom was linearly increased over 10 min (0.17 mM/min, measurement accuracy: 96%) after injecting gadoteridol (100 mM) at a constant rate (0.24 ml/s, 4 ml). The repeatability of the CEC within the phantom was 0.997 when assessed by the ICC. The reproducibility of the volume transfer constant, Ktrans , was the highest of the PK parameters regardless of the PK models. The ICCs of Ktrans in the TM, ETM, and SSM before DP4-based error correction were 0.34, 0.39, and 0.72, respectively, while those increased to 0.93, 0.98, and 0.86, respectively, after correction. CONCLUSIONS The DP4 phantom is reliable, portable, and capable of significantly improving the reproducibility of qDCE-MRI measurements.
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Affiliation(s)
- Martin D Holland
- Interdisciplinary Engineering, University of Alabama, Birmingham, Alabama, USA
| | - Andres Morales
- Engineering and Innovative Technology Development, University of Alabama, Birmingham, Alabama, USA
| | | | - Brandon Smith
- Engineering and Innovative Technology Development, University of Alabama, Birmingham, Alabama, USA
| | - Samuel R Misko
- Engineering and Innovative Technology Development, University of Alabama, Birmingham, Alabama, USA
| | - Xiaoyu Jiang
- Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - David A Hormuth
- The Oden Institute for Computational Engineering and Sciences, University of Texas, Austin, Texas, USA
| | - Chase Christenson
- The Oden Institute for Computational Engineering and Sciences, University of Texas, Austin, Texas, USA
| | - Roy P Koomullil
- Department of Mechanical Engineering, University of Alabama, Birmingham, Alabama, USA
| | - Desiree E Morgan
- Department of Radiology, University of Alabama, Birmingham, Alabama, USA
| | - Yufeng Li
- Department of Preventive Medicine, University of Alabama, Birmingham, Alabama, USA
| | - Junzhong Xu
- Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Thomas E Yankeelov
- The Oden Institute for Computational Engineering and Sciences, University of Texas, Austin, Texas, USA
| | - Harrison Kim
- Department of Radiology, University of Alabama, Birmingham, Alabama, USA
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12
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Zhao C, Herbst M, Weber T, Luckner C, Vogt S, Ritschl L, Kappler S, Siewerdsen JH, Zbijewski W. Slot-scan dual-energy bone densitometry using motorized X-ray systems. Med Phys 2021; 48:6673-6695. [PMID: 34628651 DOI: 10.1002/mp.15272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Revised: 08/31/2021] [Accepted: 09/24/2021] [Indexed: 11/12/2022] Open
Abstract
PURPOSE We investigate the feasibility of slot-scan dual-energy (DE) bone densitometry on motorized radiographic equipment. This approach will enable fast quantitative measurements of areal bone mineral density (aBMD) for opportunistic evaluation of osteoporosis. METHODS We investigated DE slot-scan protocols to obtain aBMD measurements at the lumbar spine (L-spine) and hip using a motorized x-ray platform capable of synchronized translation of the x-ray source and flat-panel detector (FPD). The slot dimension was 5 × 20 cm2 . The DE slot views were processed as follows: (1) convolution kernel-based scatter correction, (2) unfiltered backprojection to tile the slots into long-length radiographs, and (3) projection-domain DE decomposition, consisting of an initial adipose-water decomposition in a bone-free region followed by water-CaHA decomposition with adjustment for adipose content. The accuracy and reproducibility of slot-scan aBMD measurements were investigated using a high-fidelity simulator of a robotic x-ray system (Siemens Multitom Rax) in a total of 48 body phantom realizations: four average bone density settings (cortical bone mass fraction: 10-40%), four body sizes (waist circumference, WC = 70-106 cm), and three lateral shifts of the body within the slot field of view (FOV) (centered and ±1 cm off-center). Experimental validations included: (1) x-ray test-bench feasibility study of adipose-water decomposition and (2) initial demonstration of slot-scan DE bone densitometry on the robotic x-ray system using the European Spine Phantom (ESP) with added attenuation (polymethyl methacrylate [PMMA] slabs) ranging 2 to 6 cm thick. RESULTS For the L-spine, the mean aBMD error across all WC settings ranged from 0.08 g/cm2 for phantoms with average cortical bone fraction wcortical = 10% to ∼0.01 g/cm2 for phantoms with wcortical = 40%. The L-spine aBMD measurements were fairly robust to changes in body size and positioning, e.g., coefficient of variation (CV) for L1 with wcortical = 30% was ∼0.034 for various WC and ∼0.02 for an obese patient (WC = 106 cm) changing lateral shift. For the hip, the mean aBMD error across all phantom configurations was about 0.07 g/cm2 for a centered patient. The reproducibility of hip aBMD was slightly worse than in the L-spine (e.g., in the femoral neck, the CV with respect to changing WC was ∼0.13 for phantom realizations with wcortical = 30%) due to more challenging scatter estimation in the presence of an air-tissue interface within the slot FOV. The aBMD of the hip was therefore sensitive to lateral positioning of the patient, especially for obese patients: e.g., the CV with respect to patient lateral shift for femoral neck with WC = 106 cm and wcortical = 30% was 0.14. Empirical evaluations confirmed substantial reduction in aBMD errors with the proposed adipose estimation procedure and demonstrated robust aBMD measurements on the robotic x-ray system, with aBMD errors of ∼0.1 g/cm2 across all three simulated ESP vertebrae and all added PMMA attenuator settings. CONCLUSIONS We demonstrated that accurate aBMD measurements can be obtained on a motorized FPD-based x-ray system using DE slot-scans with kernel-based scatter correction, backprojection-based slot view tiling, and DE decomposition with adipose correction.
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Affiliation(s)
- Chumin Zhao
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland, USA
| | | | | | | | | | | | | | - Jeffrey H Siewerdsen
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland, USA.,Department of Radiology, Johns Hopkins University, Baltimore, Maryland, USA
| | - Wojciech Zbijewski
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland, USA
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13
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Liu Z, Luo Z, Chen H, Yin A, Sun H, Zhuang Z, Chen T. Optical section structured illumination-based Förster resonance energy transfer imaging. Cytometry A 2021; 101:264-272. [PMID: 34490985 DOI: 10.1002/cyto.a.24500] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Revised: 08/11/2021] [Accepted: 08/31/2021] [Indexed: 01/04/2023]
Abstract
Förster resonance energy transfer (FRET) microscopy is an important tool suitable for studying molecular interactions in living cells. Optical section structured illumination microscopy (OS-SIM), like confocal microscopy, has about 200 nm spatial resolution. In this report, we performed quantitative 3-cube FRET imaging in OS-SIM mode and widefield microscopy (WF) mode, respectively, for living cells expressing FRET constructs consisting of Cerulean (C, donor) and Venus (V, acceptor). OS-SIM images exhibited higher resolution than WF images. Four spectral crosstalk coefficients measured under OS-SIM mode are consistent with those measured under WF mode. Similarly, the system calibration factors G and k measured under OS-SIM mode were consistent with those measured under WF mode. The measured FRET efficiency (E) values of C32V and C17V as well as C5V constructs, standard FRET plasmids, in living Hela cells were E C 32 V OSF = 0.32 ± 0.02 , E C 17 V OSF = 0.38 ± 0.02 , and E C 5 V OSF = 0.45 ± 0.03 , and the measured acceptor-to-donor concentration ratios ( R c ) were R C 32 V OSF = 1.07 ± 0.03 , R C 17 V OSF = 1.09 ± 0.03 , and R C 5 V OSF = 1.02 ± 0.04 , consistent with the reported values. Collectively, our data demonstrates that OS-SIM can be integrated into FRET microscopy to build an OS-SIM-FRET with confocal microscopy-like resolution.
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Affiliation(s)
- Zhi Liu
- Key Laboratory of Laser Life Science, Ministry of Education, College of Biophotonics, South China Normal University, Guangzhou, Guangdong, China.,Guangdong Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, Guangdong, China
| | - Zewei Luo
- Key Laboratory of Laser Life Science, Ministry of Education, College of Biophotonics, South China Normal University, Guangzhou, Guangdong, China.,Guangdong Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, Guangdong, China
| | - Hongce Chen
- Key Laboratory of Laser Life Science, Ministry of Education, College of Biophotonics, South China Normal University, Guangzhou, Guangdong, China.,Guangdong Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, Guangdong, China
| | - Ao Yin
- Key Laboratory of Laser Life Science, Ministry of Education, College of Biophotonics, South China Normal University, Guangzhou, Guangdong, China.,Guangdong Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, Guangdong, China
| | - Han Sun
- Key Laboratory of Laser Life Science, Ministry of Education, College of Biophotonics, South China Normal University, Guangzhou, Guangdong, China.,Guangdong Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, Guangdong, China
| | - Zhengfei Zhuang
- Key Laboratory of Laser Life Science, Ministry of Education, College of Biophotonics, South China Normal University, Guangzhou, Guangdong, China.,Guangdong Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, Guangdong, China.,SCNU Qingyuan Institute of Science and Technology Innovation Co., Ltd., South China Normal University, Qingyuan, China
| | - Tongsheng Chen
- Key Laboratory of Laser Life Science, Ministry of Education, College of Biophotonics, South China Normal University, Guangzhou, Guangdong, China.,Guangdong Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, Guangdong, China.,SCNU Qingyuan Institute of Science and Technology Innovation Co., Ltd., South China Normal University, Qingyuan, China
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14
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Tontarawongsa S, Visitsattapongse S, Pechprasarn S. Performance Analysis of Non-Interferometry Based Surface Plasmon Resonance Microscopes. Sensors (Basel) 2021; 21:5230. [PMID: 34372467 DOI: 10.3390/s21155230] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 07/21/2021] [Accepted: 07/29/2021] [Indexed: 01/03/2023]
Abstract
Surface plasmon microscopy has been of interest to the science and engineering community and has been utilized in broad aspects of applications and studies, including biochemical sensing and biomolecular binding kinetics. The benefits of surface plasmon microscopy include label-free detection, high sensitivity, and quantitative measurements. Here, a theoretical framework to analyze and compare several non-interferometric surface plasmon microscopes is proposed. The scope of the study is to (1) identify the strengths and weaknesses in each surface plasmon microscopes reported in the literature; (2) quantify their performance in terms of spatial imaging resolution, imaging contrast, sensitivity, and measurement accuracy for quantitative and non-quantitative imaging modes of the microscopes. Six types of non-interferometric microscopes were included in this study: annulus aperture scanning, half annulus aperture scanning, single-point scanning, double-point scanning, single-point scanning, at 45 degrees azimuthal angle, and double-point scanning at 45 degrees azimuthal angle. For non-quantitative imaging, there is a substantial tradeoff between the image contrast and the spatial resolution. For the quantitative imaging, the half annulus aperture provided the highest sensitivity of 127.058 rad/μm2 RIU−1, followed by the full annulus aperture of 126.318 rad/μm2 RIU−1. There is a clear tradeoff between spatial resolution and sensitivity. The annulus aperture and half annulus aperture had an optimal resolution, sensitivity, and crosstalk compared to the other non-interferometric surface plasmon resonance microscopes. The resolution depends strongly on the propagation length of the surface plasmons rather than the numerical aperture of the objective lens. For imaging and sensing purposes, the recommended microfluidic channel size and protein stamping size for surface plasmon resonance experiments is at least 25 μm for accurate plasmonic measurements.
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15
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Yadav D. Diagnostic tools for evaluating the effectiveness of COVID 19 vaccines: Challenges and solution. J Family Med Prim Care 2021; 10:2059-2060. [PMID: 34322400 PMCID: PMC8284238 DOI: 10.4103/jfmpc.jfmpc_625_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 05/12/2021] [Indexed: 11/04/2022] Open
Abstract
Evaluation of potential immunity due to SARS-CoV-2 (Severe acute respiratory syndrome coronavirus 2) infection or vaccination is essential for health as well as social and economic recovery. Two vaccines (Covishield and Covaxin) produced in India have been authorized for emergency use in India. Which vaccine to prefer if the choices given to the recipients is a matter of general curiosity and public health interest. Different types of testing methodologies are being carried out in various laboratories around the world. There is no standardized measurement process and definitive set of values to know the protective immune response. A suitable antibody test which can be used as a tool to check whether the vaccine has triggered a sufficient immune response is required. The method needs to have the ability to measure the true quantity of antibody generated and it should be traceable to the international unit.
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Affiliation(s)
- Dinesh Yadav
- Senior Consultant & Head- Biochemistry & Immunoassay, Sri Balaji Action Medical Institute, Paschim Vihar, New Delhi, India
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16
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Alonso WJ, Schuck-Paim C. Pain-Track: a time-series approach for the description and analysis of the burden of pain. BMC Res Notes 2021; 14:229. [PMID: 34090484 PMCID: PMC8180079 DOI: 10.1186/s13104-021-05636-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 05/25/2021] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE To present the Pain-Track, a novel framework for the description and analysis of the pain experience based on its temporal evolution, around which intensity and other attributes of pain (texture, anatomy), interventions and clinical symptoms can be registered. This time-series approach can provide valuable insight on the expected evolution of the pain typically associated with different medical conditions and on time-varying (risk) factors associated with the temporal dynamics of pain. RESULTS We illustrate the use of the framework to explore hypotheses on the temporal profile of the pain associated with an acute injury (bone fracture), and the magnitude of the pain burden it represents. We also show that, by focusing on the critical dimensions of the pain experience (intensity and time), the approach can help map different conditions to a common scale directly relating to the experiences of those who endure them (time in pain), providing the basis for the quantification of the burden of pain inflicted upon individuals or populations. An electronic version for data entry and interpretation is also presented.
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Affiliation(s)
- Wladimir J Alonso
- Epidemiology Research Group EPIDOT, Department of Public Health, Federal University of Santa Catarina, Florianopolis, Santa Catarina, Brazil.
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17
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Jukes C, Bjerre A, Codina C, Griffiths H. Measurement of ductions and fields of binocular single vision (BSV): orthoptic practice in the UK and Ireland. Strabismus 2021; 29:95-101. [PMID: 33904348 DOI: 10.1080/09273972.2021.1914679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
To evaluate the current clinical practice of quantifying ductions and fields of BSV in the UK and Ireland using an online questionnaire. An anonymous online questionnaire with twenty-one questions was distributed in February 2019 via the British and Irish Orthoptic Society (BIOS) members' newsletter. Objectives were to investigate: methods used, frequency of assessment, limiting factors and opinions of importance. Informed consent was gained to include the responses in the study. The data was analyzed using descriptive statistics and Wilcoxon Signed Ranks Testing. The questionnaire was completed by 105 orthoptists. The methods reported to quantify ductions and fields of BSV respectively were: Goldmann (33% and 34%), Aimark (22 and 23%), Lister (7%), Octopus (5 and 4%), Thomson ocular motility analyzer (2 and 3%), Binocular vision analyzer (2%) and no method reported (30% and 32%). The frequency of measuring ductions and fields of BSV per week (median 1-2) was significantly less than the number of patients seen with limited ocular motility per week (median 6-9). The main reasons for never or rarely measuring ductions or fields of BSV were not enough time, no method available and only on selected patients. Respondents indicated that they would measure ductions and fields of BSV more frequently if a quicker portable method was available (median 3-5 times per week). Most agreed that measurements of ductions and fields of BSV are important (89 and 95% respectively). There is no standardized method of quantitively measuring ductions or fields of BSV, with almost a third of respondents not measuring either. Although most orthoptists agreed these measurements are important, they are infrequently performed. The main factors limiting these assessments are insufficient time and lack of a testing method. If a faster portable device was available, orthoptists would measure ductions and fields of BSV more frequently.
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Affiliation(s)
- Catherine Jukes
- Orthoptic Department, Blackpool Teaching Hospital, Blackpool.,Division of Ophthalmology and Orthoptics, University of Sheffield, Sheffield
| | - A Bjerre
- Division of Ophthalmology and Orthoptics, University of Sheffield, Sheffield
| | - C Codina
- Division of Ophthalmology and Orthoptics, University of Sheffield, Sheffield
| | - H Griffiths
- Division of Ophthalmology and Orthoptics, University of Sheffield, Sheffield
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18
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Ma L, Liu SY, Cen SS, Li Y, Zhang H, Han C, Gu ZQ, Mao W, Ma JH, Zhou YT, Xu EH, Chan P. Detection of Motor Dysfunction With Wearable Sensors in Patients With Idiopathic Rapid Eye Movement Disorder. Front Bioeng Biotechnol 2021; 9:627481. [PMID: 33937213 PMCID: PMC8084288 DOI: 10.3389/fbioe.2021.627481] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 03/29/2021] [Indexed: 11/17/2022] Open
Abstract
Patients with idiopathic rapid eye movement sleep behavior disorder (iRBD) are at high risk for conversion to synucleinopathy and Parkinson disease (PD). This can potentially be monitored by measuring gait characteristics of iRBD patients, although quantitative data are scarce and previous studies have reported inconsistent findings. This study investigated subclinical gait changes in polysomnography-proven iRBD patients compared to healthy controls (HCs) during 3 different walking conditions using wearable motor sensors in order to determine whether gait changes can be detected in iRBD patients that could reflect early symptoms of movement disorder. A total 31 iRBD patients and 20 HCs were asked to walk in a 10-m corridor at their usual pace, their fastest pace, and a normal pace while performing an arithmetic operation (dual-task condition) for 1 min each while using a wearable gait analysis system. General gait measurements including stride length, stride velocity, stride time, gait length asymmetry, and gait variability did not differ between iRBD patients and HCs; however, the patients showed decreases in range of motion (P = 0.004) and peak angular velocity of the trunk (P = 0.001) that were significant in all 3 walking conditions. iRBD patients also had a longer step time before turning compared to HCs (P = 0.035), and the difference between groups remained significant after adjusting for age, sex, and height. The decreased trunk motion while walking and increased step time before turning observed in iRBD may be early manifestations of body rigidity and freezing of gait and are possible prodromal symptoms of PD.
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Affiliation(s)
- Lin Ma
- Department of Neurobiology, Neurology and Geriatrics, Xuanwu Hospital of Capital Medical University, Beijing Institute of Geriatrics, Beijing, China
| | - Shu-Ying Liu
- Department of Neurobiology, Neurology and Geriatrics, Xuanwu Hospital of Capital Medical University, Beijing Institute of Geriatrics, Beijing, China
| | - Shan-Shan Cen
- Department of Neurobiology, Neurology and Geriatrics, Xuanwu Hospital of Capital Medical University, Beijing Institute of Geriatrics, Beijing, China
| | - Yuan Li
- Department of Neurobiology, Neurology and Geriatrics, Xuanwu Hospital of Capital Medical University, Beijing Institute of Geriatrics, Beijing, China
| | - Hui Zhang
- Department of Neurobiology, Neurology and Geriatrics, Xuanwu Hospital of Capital Medical University, Beijing Institute of Geriatrics, Beijing, China
| | - Chao Han
- National Clinical Research Center for Geriatric Disorders, Beijing, China
| | - Zhu-Qin Gu
- Clinical and Research Center for Parkinson's Disease, Capital Medical University, Beijing, China
| | - Wei Mao
- Department of Neurobiology, Neurology and Geriatrics, Xuanwu Hospital of Capital Medical University, Beijing Institute of Geriatrics, Beijing, China
| | - Jing-Hong Ma
- Department of Neurobiology, Neurology and Geriatrics, Xuanwu Hospital of Capital Medical University, Beijing Institute of Geriatrics, Beijing, China
| | - Yong-Tao Zhou
- Department of Neurobiology, Neurology and Geriatrics, Xuanwu Hospital of Capital Medical University, Beijing Institute of Geriatrics, Beijing, China
| | - Er-He Xu
- Department of Neurobiology, Neurology and Geriatrics, Xuanwu Hospital of Capital Medical University, Beijing Institute of Geriatrics, Beijing, China
| | - Piu Chan
- Department of Neurobiology, Neurology and Geriatrics, Xuanwu Hospital of Capital Medical University, Beijing Institute of Geriatrics, Beijing, China.,National Clinical Research Center for Geriatric Disorders, Beijing, China.,Clinical and Research Center for Parkinson's Disease, Capital Medical University, Beijing, China.,Key Laboratory for Neurodegenerative Disease of the Ministry of Education, Beijing Key Laboratory for Parkinson's Disease, Parkinson Disease Center of Beijing Institute for Brain Disorders, Beijing, China.,Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing, China
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Xia K, Wang J, Yu L, Sun W, Huang X, Zhao Z, Liu J. Dentofacial characteristics and age in association with incisor bony support in adult female patients with bimaxillary dentoalveolar protrusion. Orthod Craniofac Res 2021; 24:585-592. [PMID: 33780599 DOI: 10.1111/ocr.12484] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 01/26/2021] [Accepted: 03/25/2021] [Indexed: 02/05/2023]
Abstract
OBJECTIVE The aim of this study was to analyse the correlation between incisor alveolar bone thickness (IABT) and dentofacial characteristics or age in adult female patients with bimaxillary dentoalveolar protrusion (BDP). Evaluating the contribution of these characteristics may help to predict the IABT differences in this patient population. SETTING AND SAMPLE POPULATION A retrospective study whose sample comprised 80 pretreatment adult female patients with BDP (mean age 24.6 years). MATERIALS AND METHODS The IABT of the bimaxillary central incisors was measured by cone-beam computed tomography. Among the types of IABT, the apical trabecular bone thickness was measured with a quantitative method. The sagittal skeletal pattern, facial divergence, the incisor inclination angle, and mandibular plane angulation were determined by cephalometric analysis. A backward linear multiple regression was performed to analyse the associations between IABT and these characteristics. RESULTS Three dentofacial traits and age were associated with IABT. Patients with increased age and facial divergence tended to have a thinner mandibular incisor bone support, while increased root length was associated with a thicker mandibular incisor apical bone thickness. Increased U1-SN and facial divergence may lead to a thinner maxillary incisor palatal bone, while increased U1-SN resulted in a thicker maxillary incisor labial bone. CONCLUSIONS The bony support of the incisors is associated with age and dentofacial traits. Increasing age and facial divergence are considered risk factors for alveolar defects in female patients with BDP. In contrast, increased root length is associated with a thicker mandibular incisor apical bone support.
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Affiliation(s)
- Kai Xia
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jing Wang
- Department of Stomatology, Second People's Hospital of Baiyin, Baiyin, China
| | - Liyuan Yu
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Wentian Sun
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xinqi Huang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Zhihe Zhao
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jun Liu
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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20
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Rong P, Pattee GL. A potential upper motor neuron measure of bulbar involvement in amyotrophic lateral sclerosis using jaw muscle coherence. Amyotroph Lateral Scler Frontotemporal Degener 2021; 22:368-379. [PMID: 33522298 DOI: 10.1080/21678421.2021.1874993] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
OBJECTIVE To identify a novel, quantitative bulbar measure in amyotrophic lateral sclerosis (ALS) based on jaw muscle coherence. Methods: The myoelectric activities of masseter, anterior temporalis, and anterior belly of digastric were recorded bilaterally during a speech task in 12 individuals with ALS and 10 neurologically healthy controls, using surface electromyography. Coherence and directed coherence were calculated for all muscle pairs. The muscle pairs showing significant coherence and directed coherence in the beta-band (15-35 Hz) were identified and their mean beta-band coherence were (1) correlated with the kinematic (i.e. jaw acceleration time) and functional speech (i.e. speaking rate) measures that have been previously identified to be affected by bulbar ALS, across all participants, and (2) evaluated in terms of their efficacy in differentiating individuals with ALS from healthy controls. Results: Beta-band coherence was in general reduced in ALS relative to healthy controls, with the antagonistic and homologous muscle pairs being more affected than the agonistic pairs. Among all muscle pairs, the coherence between masseter and digastric (1) showed the strongest correlations with jaw acceleration time and speaking rate, and (2) differentiated individuals with ALS from healthy controls with the highest sensitivity (i.e. 0.92) and specificity (i.e. 0.90). Conclusions: Reduced beta-band coherence between masseter and digastric in ALS reflects weakened neural linkage between these muscles resulting from the disrupted cortical drive to the bulbar musculature. These findings provide preliminary evidence for jaw muscle coherence as a novel, quantitative measure of corticobulbar involvement, designed to improve bulbar assessment in ALS.
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Affiliation(s)
- Panying Rong
- Department of Speech-Language-Hearing: Sciences and Disorders, University of Kansas, Lawrence, KS, USA
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21
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Yin A, Sun H, Chen H, Liu Z, Tang Q, Yuan Y, Tu Z, Zhuang Z, Chen T. Measuring calibration factors by imaging a dish of cells expressing different tandem constructs plasmids. Cytometry A 2021; 99:632-640. [PMID: 33491868 DOI: 10.1002/cyto.a.24316] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 12/17/2020] [Accepted: 12/21/2020] [Indexed: 12/15/2022]
Abstract
Three-cube Förster resonance energy transfer (FRET) method is the most extensively applied approach for live-cell FRET quantification. Reliable measurements of calibration factors are crucial for quantitative FRET measurement. We here proposed a modified TA-G method (termed as mTA-G) to simultaneously obtain the FRET-sensitized quenching transition factor (G) and extinction coefficients ratio (γ) between donor and acceptor. mTA-G method includes four steps: (1) predetermining the ratio ranges of the sensitized emission of acceptor (FC ) to the donor excitation and donor channel image (IDD [(DA])) for all FRET plasmids; (2) culturing the cells which express every FRET plasmid in one dish respectively; (3) distinguishing and marking the cells expressing different FRET plasmids by detecting their FC /IDD (DA) values; (4) linearly fitting FC /IAA (DA) (acceptor excitation and acceptor channel image) to IDD (DA)/IAA (DA) for different kinds of cells. We implemented mTA-G method by imaging tandem constructs cells with different FRET efficiency cultured in one dish on different days, and obtained consistent G and γ values. mTA-G method not only circumvents switchover of different culture dishes but also keep the constant imaging conditions, exhibiting excellent robustness, and thus will expands the biological applications of quantitative FRET analysis in living cells.
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Affiliation(s)
- Ao Yin
- Key Laboratory of Laser Life Science, Ministry of Education, College of Biophotonics, South China Normal University, Guangzhou, China.,Guangdong Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, China
| | - Han Sun
- Key Laboratory of Laser Life Science, Ministry of Education, College of Biophotonics, South China Normal University, Guangzhou, China.,Guangdong Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, China
| | - Hongce Chen
- Key Laboratory of Laser Life Science, Ministry of Education, College of Biophotonics, South China Normal University, Guangzhou, China.,Guangdong Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, China
| | - Zhi Liu
- Key Laboratory of Laser Life Science, Ministry of Education, College of Biophotonics, South China Normal University, Guangzhou, China.,Guangdong Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, China
| | - Qiling Tang
- Key Laboratory of Laser Life Science, Ministry of Education, College of Biophotonics, South China Normal University, Guangzhou, China.,Guangdong Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, China
| | - Ye Yuan
- Key Laboratory of Laser Life Science, Ministry of Education, College of Biophotonics, South China Normal University, Guangzhou, China.,Guangdong Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, China
| | - Zhuang Tu
- Key Laboratory of Laser Life Science, Ministry of Education, College of Biophotonics, South China Normal University, Guangzhou, China.,Guangdong Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, China
| | - Zhengfei Zhuang
- Key Laboratory of Laser Life Science, Ministry of Education, College of Biophotonics, South China Normal University, Guangzhou, China.,Guangdong Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, China
| | - Tongsheng Chen
- Key Laboratory of Laser Life Science, Ministry of Education, College of Biophotonics, South China Normal University, Guangzhou, China.,Guangdong Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, China
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22
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Kawanishi Y, Nozaki M, Kobayashi M, Yasuma S, Fukushima H, Murase A, Takenaga T, Yoshida M, Kuroyanagi G, Kawaguchi Y, Nagaya Y, Murakami H. Preoperative Knee Instability Affects Residual Instability as Evaluated by Quantitative Pivot-Shift Measurements During Double-Bundle ACL Reconstruction. Orthop J Sports Med 2020; 8:2325967120959020. [PMID: 33178876 PMCID: PMC7592323 DOI: 10.1177/2325967120959020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Accepted: 04/23/2020] [Indexed: 01/11/2023] Open
Abstract
Background: The pivot-shift test is an important indicator of functional outcomes after anterior cruciate ligament (ACL) reconstruction (ACLR). Preoperative instability as indicated by the pivot-shift test is associated with residual instability after ACLR. Few studies have used quantitative means to evaluate the pivot shift after ACLR. Purpose: To investigate the relationship between preoperative and residual instability and to identify the risk factors for residual instability by using quantitative measurements of the pivot shift. Study Design: Case-control study; Level of evidence, 3. Methods: A total of 91 patients undergoing primary double-bundle ACLR were retrospectively enrolled. Quantitative measurements of instability for ACL-deficient knees (ACLD) and uninjured contralateral knees (intact) preoperatively, as well as ACLR knees intraoperatively, were performed under general anesthesia using the pivot-shift test, with inertial sensors to measure acceleration and external rotational (ER) angular velocity. The ratios of intact to ACLD (ACLD/I) and intact to ACLR (ACLR/I) were measured. Patients who showed an ACLR/I of >1 were classified into the residual instability group, and those with an ACLR/I of ≤1 were classified into the noninstability group. Regarding demographic, surgical, and quantitative measurement factors, between-group comparisons and multivariate logistic regression were conducted for predictors of residual instability. Receiver operating characteristic curves were used to evaluate the correlations between ACLD/I and ACLR/I and the cutoff value of ACLD/I in predicting residual instability. Results: The predictive factors for intraoperative residual instability included female sex (odds ratio [OR], 0.3 [95% CI, 0.1-0.9]; P = .034) and ACLD/I for acceleration (OR, 1.6 [95% CI, 1.2-2.1]; P < .001), and ACLD/I for ER angular velocity (OR, 1.9 [95% CI, 1.2-3.1]; P = .013). Correlations between ACLD/I and ACLR/I were moderate with respect to both acceleration (r = 0.435; P < .001) and ER angular velocity (r = 0.533; P < .001). The cutoff points for ACLD/I were 4.9 for acceleration (sensitivity, 65.1%; specificity, 85.7%; area under the curve [AUC], 0.76) and 2.4 for ER angular velocity (sensitivity, 80.0%; specificity, 50.0%; AUC, 0.74). Conclusion: Greater preoperative instability was a risk factor for residual instability as measured intraoperatively by a quantitatively evaluation in the pivot shift during ACL reconstruction. Quantitative measurements of instability during the pivot shift mechanism under general anesthesia may enable surgeons to predict postoperative residual instability.
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Affiliation(s)
- Yusuke Kawanishi
- Department of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Masahiro Nozaki
- Department of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Makoto Kobayashi
- Department of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | | | - Hiroaki Fukushima
- Department of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | | | - Tetsuya Takenaga
- Department of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Masahito Yoshida
- Department of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Gen Kuroyanagi
- Department of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Yohei Kawaguchi
- Department of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Yuko Nagaya
- Department of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Hideki Murakami
- Department of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
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23
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Chia DSY, Doi K, Hattori Y, Sakamoto S. Elbow flexion strength and contractile activity after partial ulnar nerve or intercostal nerve transfers for brachial plexus injuries. J Hand Surg Eur Vol 2020; 45:818-826. [PMID: 32380918 DOI: 10.1177/1753193420922184] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
We compared the outcomes of 23 partial ulnar nerve and 15 intercostal nerve transfers for elbow flexion reconstruction in patients with C56 or C567 brachial plexus injuries using manual muscle power, dynamometric measurements of elbow flexion strength and electromyography. The range of elbow flexion and muscle strength recovery to Grade 3 or 4 were comparable between the two groups. The patients with C567 injuries had significantly stronger eccentric contraction after the partial ulnar nerve transfer than after the intercostal nerve transfer (p < 0.05). Electromyography of individual muscles demonstrated that the patients with partial ulnar nerve transfers were unable to voluntarily isolate biceps contraction and recruited forearm flexors and extensors. The patients after partial ulnar nerve transfer had significantly more activity of the forearm muscles during concentric elbow flexion than after intercostal nerve transfers (p < 0.05). We conclude that partial ulnar nerve transfers were superior to intercostal nerve transfers when assessed quantitatively with the dynamometer to evaluate elbow flexion, although simultaneous recruitment of forearm muscles may have contributed to the increased elbow flexion strength in the patients with the partial ulnar nerve transfer.Level of evidence: III.
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Affiliation(s)
- Dawn Sinn Yii Chia
- Department of Orthopedic Surgery, Ogori Daiichi General Hospital, Ogori, Japan
| | - Kazuteru Doi
- Department of Orthopedic Surgery, Ogori Daiichi General Hospital, Ogori, Japan
| | - Yasunori Hattori
- Department of Orthopedic Surgery, Ogori Daiichi General Hospital, Ogori, Japan
| | - Sotetsu Sakamoto
- Department of Orthopedic Surgery, Ogori Daiichi General Hospital, Ogori, Japan
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24
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Zare M, Bodin J, Sagot JC, Roquelaure Y. Quantification of Exposure to Risk Postures in Truck Assembly Operators: Neck, Back, Arms and Wrists. Int J Environ Res Public Health 2020; 17:ijerph17176062. [PMID: 32825386 PMCID: PMC7503406 DOI: 10.3390/ijerph17176062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 08/10/2020] [Accepted: 08/17/2020] [Indexed: 11/16/2022]
Abstract
The study assessed the proportion of time in risky postures for the main joints of the upper limbs in a truck assembly plant and explored the association with musculoskeletal symptoms. Fourteen workstations (13 individuals) of a truck assembly plant were selected, and seven sensors were placed on the body segments of the participants. The sensors included tri-axial accelerometers for the arms and back, inclinometers for the neck and electro-goniometry for quantifying flexion/extension of the right and left hands. The proportions of time in moderate awkward postures were high at all workstations. Neck and wrist excessive awkward postures were observed for most workstations. The average values of the 91st percentile for back flexion and right/left arm elevation were 25°, 62°, and 57°, respectively. The 91st and 9th percentile averages for neck flexion/extension were 35.9° and −4.7°, respectively. An insignificant relationship was found between the percentage of time spent in awkward upper limb posture and musculoskeletal symptoms. The findings provide objective and quantitative data about time exposure, variability, and potential risk factors in the real workplace. Quantitative measurements in the field provide objective data of the body postures and movements of tasks that can be helpful in the musculoskeletal disorders (MSDs) prevention program.
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Affiliation(s)
- Mohsen Zare
- Univ Angers, CHU Angers, Univ Rennes, Inserm, EHESP, Irset (Institut de Recherche en Santé, Environnement et Travail)—UMR_S 1085, F-49000 Angers, France; (J.B.); (Y.R.)
- ERCOS Group (Pôle), Laboratory of ELLIAD-EA4661, UTBM-University of Bourgogne Franche-Comté, Belfort 90001, France;
- Correspondence: ; Tel.: +33-7-8772-2141
| | - Julie Bodin
- Univ Angers, CHU Angers, Univ Rennes, Inserm, EHESP, Irset (Institut de Recherche en Santé, Environnement et Travail)—UMR_S 1085, F-49000 Angers, France; (J.B.); (Y.R.)
| | - Jean-Claude Sagot
- ERCOS Group (Pôle), Laboratory of ELLIAD-EA4661, UTBM-University of Bourgogne Franche-Comté, Belfort 90001, France;
| | - Yves Roquelaure
- Univ Angers, CHU Angers, Univ Rennes, Inserm, EHESP, Irset (Institut de Recherche en Santé, Environnement et Travail)—UMR_S 1085, F-49000 Angers, France; (J.B.); (Y.R.)
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25
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Huang S, Wang J, Guo Z, Wang Y, Liu C. Quantitative Measurement of Melittin in Asian Honeybee Venom Using a New Method Including UPLC-QqTOF-MS. Toxins (Basel) 2020; 12:toxins12070437. [PMID: 32635485 PMCID: PMC7404999 DOI: 10.3390/toxins12070437] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 06/29/2020] [Accepted: 07/01/2020] [Indexed: 12/28/2022] Open
Abstract
Asian honeybee venom is widely used in traditional oriental medicine. Melittin is the main component of Asian honeybee venom. In the present study, an ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry (UPLC-QqTOF-MS) method was used for accurate qualitative and quantitative analyses of melittin in Asian honeybee venom. The results showed that the dynamic linear range of melittin was from 0.094 to 20 μg/mL, and the limit of quantification was 0.3125 μg/mL. The spiking recovery of melittin in honeybee venom ranged from 84.88% to 93.05%. Eighteen Asian honeybee venom samples in eighteen batches were collected from two different zones of China, and their melittin contents were measured. The contents of melittin in Asian honeybee venom samples was 33.9–46.23% of dry weight. This method proved a useful tool for the rapid evaluation of the authenticity and quality of Asian honeybee venom in terms of the melittin contents, and will contribute to a broader understanding of Asian honeybee venom.
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26
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Duan M, Song H, Wang C, Zheng J, Xie H, He Y, Huang L, Zhou F. Detection and Independent Validation of Model-Based Quantitative Transcriptional Regulation Relationships Altered in Lung Cancers. Front Bioeng Biotechnol 2020; 8:582. [PMID: 32656193 PMCID: PMC7325891 DOI: 10.3389/fbioe.2020.00582] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 05/13/2020] [Indexed: 12/27/2022] Open
Abstract
Differential expressions of genes are widely evaluated for the diagnosis and prognosis correlations with diseases. But limited studies investigate how transcriptional regulations are quantitatively altered in diseases. This study proposes a novel model-based quantitative measurement of transcriptional regulatory relationships between mRNA genes and Transcription Factor (TF) genes (mqTrans features). This study didn't consider the regulatory relationships between TF genes, so the mRNA genes were the protein-coding genes excluding the TF genes. The models are trained in the control samples in a lung cancer dataset and evaluated in two independent datasets and the hold-out testing samples from the third dataset. Twenty-nine mRNA genes are detected with transcriptional regulations quantitatively altered in lung cancers. The transcriptional modification technologies like RNA interference (RNAi) may be utilized to restore the altered transcriptional regulations in lung cancers.
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Affiliation(s)
- Meiyu Duan
- Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education, College of Computer Science and Technology, Jilin University, Changchun, China
| | - Haoqiu Song
- Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education, College of Computer Science and Technology, Jilin University, Changchun, China.,College of Computer Science, Hubei University of Technology, Wuhan, China
| | - Chaoyu Wang
- Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education, College of Software, Jilin University, Changchun, China
| | - Jiaxin Zheng
- Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education, College of Software, Jilin University, Changchun, China
| | - Hui Xie
- Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education, College of Computer Science and Technology, Jilin University, Changchun, China
| | - Yupeng He
- Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education, College of Software, Jilin University, Changchun, China
| | - Lan Huang
- Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education, College of Computer Science and Technology, Jilin University, Changchun, China
| | - Fengfeng Zhou
- Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education, College of Computer Science and Technology, Jilin University, Changchun, China
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27
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Affiliation(s)
- Laura Badenes-Ribera
- Department of Behavioral Sciences Methodology, University of Valencia, Valencia, Spain
| | - N Clayton Silver
- Department of Psychology, University of Nevada, Las Vegas, NV, United States
| | - Elisa Pedroli
- Centro Neuropsicologia, Istituto Auxologico Italiano (IRCCS), Milan, Italy
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28
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Abstract
To evaluate the feasibility and clinical value of three-dimensional ultrasound in evaluating ovarian function in perimenopausal women. In this prospective cohort study, 102 patients with clinically suspected perimenopause and 90 patients with menopause were enrolled. These patients were classified into three groups according to the level of follicle stimulating hormone (FSH) and estradiol (E2): menopause group, perimenopause group, and normal group. Perimenopause group: There were significant differences in volume, vascularization index (VI), flow index (FI), and vascularization-flow index (VFI) in the ovaries after treatment. Cycle 1 > cycle 0 (p < .05) and cycle 3 <cycle 0 (p < .05) in FSH. Menopause group: There were significant differences in volume, VI, FI, and VFI of the ovaries after treatment: Cycle 3 >cycle 0 (p < .05), and in FSH: cycle 3 < cycle 0 (p < .05). Three-dimensional ultrasound in ovarian quantitative measurement can objectively reflect the change in the ovarian function, predicting the effect of drug treatment, and provided an objective information for early intervention to menopausal.
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Affiliation(s)
- Ren-Liang Li
- Department of Obstetrics and Gynecology, Wenzhou People's Hospital, Wenzhou Third Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou, PR China
| | - Xiao-Lu Shen
- Department of Obstetrics and Gynecology, Wenzhou People's Hospital, Wenzhou Third Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou, PR China
| | - Fang Xu
- Department of Obstetrics and Gynecology, Wenzhou People's Hospital, Wenzhou Third Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou, PR China
| | - Xu-Juan Shui
- Department of Obstetrics and Gynecology, Wenzhou People's Hospital, Wenzhou Third Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou, PR China
| | - Yu-Mei Chen
- Department of Obstetrics and Gynecology, Wenzhou People's Hospital, Wenzhou Third Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou, PR China
| | - Wen-Huan Wang
- Department of Obstetrics and Gynecology, Wenzhou People's Hospital, Wenzhou Third Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou, PR China
| | - Jia-Yong Zheng
- Department of Obstetrics and Gynecology, Wenzhou People's Hospital, Wenzhou Third Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou, PR China
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Xu Y, Yamashiro T, Moriya H, Muramatsu S, Murayama S. Quantitative Emphysema Measurement On Ultra-High-Resolution CT Scans. Int J Chron Obstruct Pulmon Dis 2019; 14:2283-2290. [PMID: 31631998 PMCID: PMC6790117 DOI: 10.2147/copd.s223605] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Accepted: 09/23/2019] [Indexed: 12/29/2022] Open
Abstract
Purpose To evaluate the advantages of ultra-high-resolution computed tomography (U-HRCT) scans for the quantitative measurement of emphysematous lesions over conventional HRCT scans. Materials and methods This study included 32 smokers under routine clinical care who underwent chest CT performed by a U-HRCT scanner. Chronic obstructive pulmonary disease (COPD) was diagnosed in 13 of the 32 participants. Scan data were reconstructed by 2 different protocols: i) U-HRCT mode with a 1024×1024 matrix and 0.25-mm slice thickness and ii) conventional HRCT mode with a 512×512 matrix and 0.5-mm slice thickness. On both types of scans, lesions of emphysema were quantitatively assessed as percentage of low attenuation volume (LAV%, <-950 Hounsfield units). LAV% values determined for scan data from the U-HRCT and conventional HRCT modes were compared by the Wilcoxon matched-pairs signed rank test. The association between LAV% and forced expiratory volume in 1 s per forced vital capacity (FEV1/FVC) was assessed by the Spearman rank correlation test. Results Mean values for LAV% determined for the U-HRCT and conventional HRCT modes were 8.9 ± 8.8% and 7.3 ± 8.4%, respectively (P<0.0001). The correlation coefficients for LAV% and FEV1/FVC on the U-HRCT and conventional HRCT modes were 0.50 and 0.49, respectively (both P<0.01). Conclusion Compared with conventional HRCT scans, U-HRCT scans reveal emphysematous lesions in greater detail, and provide slightly increased correlation with airflow limitation.
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Affiliation(s)
- Yanyan Xu
- Department of Radiology, Graduate School of Medical Science, University of the Ryukyus, Okinawa, Japan.,Department of Radiology, China-Japan Friendship Hospital, Beijing, People's Republic of China
| | - Tsuneo Yamashiro
- Department of Radiology, Graduate School of Medical Science, University of the Ryukyus, Okinawa, Japan.,Department of Radiology, Ohara General Hospital, Fukushima, Japan
| | - Hiroshi Moriya
- Department of Radiology, Ohara General Hospital, Fukushima, Japan
| | - Shun Muramatsu
- Department of Radiology, Ohara General Hospital, Fukushima, Japan
| | - Sadayuki Murayama
- Department of Radiology, Graduate School of Medical Science, University of the Ryukyus, Okinawa, Japan
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30
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Rinderknecht MD, Dueñas JA, Held JP, Lambercy O, Conti FM, Zizlsperger L, Luft AR, Hepp-Reymond MC, Gassert R. Automated and Quantitative Assessment of Tactile Mislocalization After Stroke. Front Neurol 2019; 10:593. [PMID: 31244757 PMCID: PMC6581709 DOI: 10.3389/fneur.2019.00593] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 05/20/2019] [Indexed: 11/28/2022] Open
Abstract
Topesthesia, the recognition of tactile stimulation location on the skin, can be severely affected by neurological injuries, such as stroke. Despite topesthesia being crucial for manipulating objects and interacting with the environment during activities of daily living, deficits cannot be quantitatively captured with current clinical assessments and are, as a consequence, not well-understood. The present work describes a novel automated assessment tool for tactile mislocalization in neurological patients with somatosensory deficits. We present two cases of ischemic stroke patients, describe their tactile localization deficits with the automated assessment, and compare the results to a standard manual clinical assessment. Using the automated assessment tool, it was possible to identify, locate, precisely quantify, and depict the patients' deficits in topesthesia. In comparison, the clinical assessment was not sensitive enough and some deficits would remain undetected due to ceiling effects. In addition, an MRI structural analysis of the lesion supported the existence of somatosensory deficits. This novel and quantitative assessment may not only help to raise awareness of the implications of deficits in topesthesia, but would also allow monitoring recovery throughout the rehabilitation process, informing treatment design, and objectively evaluating treatment efficacy.
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Affiliation(s)
- Mike D Rinderknecht
- Rehabilitation Engineering Laboratory, Department of Health Sciences and Technology, Institute of Robotics and Intelligent Systems, ETH Zurich, Zurich, Switzerland
| | - Julio A Dueñas
- Rehabilitation Engineering Laboratory, Department of Health Sciences and Technology, Institute of Robotics and Intelligent Systems, ETH Zurich, Zurich, Switzerland
| | - Jeremia P Held
- Division of Vascular Neurology and Neurorehabilitation, Department of Neurology, University of Zurich and University Hospital Zurich, Zurich, Switzerland.,Cereneo, Center for Neurology and Rehabilitation, Vitznau, Switzerland
| | - Olivier Lambercy
- Rehabilitation Engineering Laboratory, Department of Health Sciences and Technology, Institute of Robotics and Intelligent Systems, ETH Zurich, Zurich, Switzerland
| | - Fabio M Conti
- Clinica Hildebrand Centro di Riabilitazione Brissago, Brissago, Switzerland
| | - Leopold Zizlsperger
- Division of Vascular Neurology and Neurorehabilitation, Department of Neurology, University of Zurich and University Hospital Zurich, Zurich, Switzerland.,Cereneo, Center for Neurology and Rehabilitation, Vitznau, Switzerland
| | - Andreas R Luft
- Division of Vascular Neurology and Neurorehabilitation, Department of Neurology, University of Zurich and University Hospital Zurich, Zurich, Switzerland.,Cereneo, Center for Neurology and Rehabilitation, Vitznau, Switzerland
| | | | - Roger Gassert
- Rehabilitation Engineering Laboratory, Department of Health Sciences and Technology, Institute of Robotics and Intelligent Systems, ETH Zurich, Zurich, Switzerland
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31
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Balsamo M, Innamorati M, Lamis DA. Editorial: Clinical Psychometrics: Old Issues and New Perspectives. Front Psychol 2019; 10:947. [PMID: 31133922 PMCID: PMC6514229 DOI: 10.3389/fpsyg.2019.00947] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 04/09/2019] [Indexed: 11/13/2022] Open
Affiliation(s)
- Michela Balsamo
- Department of Psychological, Health, and Territorial Sciences, “G. d'Annunzio” University of Chieti-Pescara, Chieti, Italy
| | - Marco Innamorati
- Department of Human Science, Università Europea di Roma, Rome, Italy
| | - Dorian A. Lamis
- Emory University School of Medicine, Atlanta, GA, United States
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Su W, Du M, Lin F, Zhang C, Chen T. Quantitative FRET measurement based on spectral unmixing of donor, acceptor and spontaneous excitation-emission spectra. J Biophotonics 2019; 12:e201800314. [PMID: 30414249 DOI: 10.1002/jbio.201800314] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 09/28/2018] [Accepted: 11/06/2018] [Indexed: 06/08/2023]
Abstract
The spontaneous excitation-emission (ExEm) spectrum is introduced to the quantitative mExEm-spFRET methodology we recently developed as a spectral unmixing component for quantitative fluorescence resonance energy transfer measurement, named as SPEES-FRET method. The spectral fingerprints of both donor and acceptor were measured in HepG2 cells with low autofluorescence separately expressing donor and acceptor, and the spontaneous spectral fingerprint of HEK293 cells with strong autofluoresence was measured from blank cells. SPEES-FRET was performed on improved spectrometer-microscope system to measure the FRET efficiency (E) and concentration ratio (R C ) of acceptor to donor vales of FRET tandem plasmids in HEK293 cells, and obtained stable and consistent results with the expected values. Moreover, SPEES-FRET always obtained stable results for the bright and dim cells coexpressing Cerulean and Venus or Cyan Fluorescent Protein (CFP)-Bax and Yellow fluorescent protein (YFP)-Bax, and the E values between CFP-Bax and YFP-Bax were 0.02 for healthy cells and 0.14 for the staurosporine (STS)-treated apoptotic cells. Collectively, SPEES-FRET has very strong robustness against cellular autofluorescence, and thus is applicable to quantitative evaluation on the protein-protein interaction in living cells with strong autofluoresence.
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Affiliation(s)
- Wenhua Su
- MOE Key Laboratory of Laser Life Science & College of Life Science, South China Normal University, Guangzhou, China
| | - Mengyan Du
- MOE Key Laboratory of Laser Life Science & College of Life Science, South China Normal University, Guangzhou, China
| | - Fangrui Lin
- MOE Key Laboratory of Laser Life Science & College of Life Science, South China Normal University, Guangzhou, China
| | - Chenshuang Zhang
- MOE Key Laboratory of Laser Life Science & College of Life Science, South China Normal University, Guangzhou, China
| | - Tongsheng Chen
- MOE Key Laboratory of Laser Life Science & College of Life Science, South China Normal University, Guangzhou, China
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Li Y, Dai Y, Yu N, Duan X, Zhang W, Guo Y, Wang J. Morphological analysis of blood vessels near lung tumors using 3-D quantitative CT. J Xray Sci Technol 2019; 27:149-160. [PMID: 30412516 DOI: 10.3233/xst-180429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
BACKGROUND Improved visualization of lung cancer-associated vessels is vital. OBJECTIVE To evaluate the efficacy of 3-D quantitative CT in lung cancer-associated pulmonary vessel assessment. METHODS Vascular CT changes were assessed visually and using FACT-Digital lung TM software (n = 162 patients, 178 controls). The total number of pulmonary vessels (TNV) and mean lumen area of pulmonary vessels (MAV) vertical to cross-sections of fifth/sixth-generation bronchioles were measured. RESULTS Visual investigation revealed fewer ipsilateral pulmonary vascular abnormalities in lung cancer (151/162) than did quantitative CT (162/162), and required more time (3.2±1.5 vs. 2.5±1.3 min) (P < 0.05). CT measurements revealed that the TNV vertical to the fifth-generation bronchial cross-section of the ipsilateral, contralateral, and control groups was 14.58±4.75, 9.58±3.74, and 10.22±4.07 and the MAV in these groups was 99.70±26.20, 58.76±29.29, and 57.76±18.32, respectively. The TNV vertical to the sixth-generation bronchial cross-section of the ipsilateral, contralateral, and control groups was 16.64±5.14, 11.59±4.06, and 11.75±4.16 and the MAV was 110.22±31.47, 67.62±30.41, and 60.24±16.18, respectively. The TNV and MAV in ipsilateral lung cancer tissues exceeded those in the contralateral side and control group tissues (P < 0.001). CONCLUSIONS Automated 3-D quantitative CT could successfully characterize pulmonary vessels and their lung cancer-associated changes.
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Affiliation(s)
- Yan Li
- Department of Medical Image, The First Affiliated Hospital of Xi'anJiaotong University, Xi'an, China
| | - Yongliang Dai
- Department of CT, The Weapons Industry of 521 Hospital, Xi'an, China
| | - Nan Yu
- Department of Radiology, The Affiliated Hospital of Shaanxi University of traditional Chinese Medicine, Xian yang, China
| | - Xiaoyi Duan
- Department of Medical Image, The First Affiliated Hospital of Xi'anJiaotong University, Xi'an, China
| | - Weishan Zhang
- Department of Medical Image, The First Affiliated Hospital of Xi'anJiaotong University, Xi'an, China
| | - Youmin Guo
- Department of Medical Image, The First Affiliated Hospital of Xi'anJiaotong University, Xi'an, China
| | - Jiansheng Wang
- The Second Department of Thoracic Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
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Hahm E, Cha MG, Kang EJ, Pham XH, Lee SH, Kim HM, Kim DE, Lee YS, Jeong DH, Jun BH. Multilayer Ag-Embedded Silica Nanostructure as a Surface-Enhanced Raman Scattering-Based Chemical Sensor with Dual-Function Internal Standards. ACS Appl Mater Interfaces 2018; 10:40748-40755. [PMID: 30375227 DOI: 10.1021/acsami.8b12640] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Surface-enhanced Raman scattering (SERS) spectroscopy is attractive in various detection analysis fields. However, the quantitative method using SERS spectroscopy remains as an area to be developed. The key issues in developing quantitative analysis methods by using SERS spectroscopy are the fabrication of reliable SERS-active materials such as nanoparticle-based structures and the acquisition of the SERS signal without any disturbance that may change the SERS signal intensity and frequency. Here, the fabrication of seamless multilayered core-shell nanoparticles with an embedded Raman label compound as an internal standard (MLRLC dots) for quantitative SERS analysis is reported. The embedded Raman label compound in the nanostructure provides a reference value for calibrating the SERS signals. By using the MLRLC dots, it is possible to gain target analyte signals of different concentrations while retaining the Raman signal of the internal standard. The ML4-BBT dots, containing 4-bromobenzenethiol (4-BBT) as an internal standard, are successfully applied in the quantitative analysis of 4-fluorobenzenethiol and thiram, a model pesticide. Additionally, ratiometric analysis was proved practical through normalization of the relative SERS intensity. The ratiometric strategy could be applied to various SERS substrates for quantitative detection of a wide variety of targets.
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Affiliation(s)
- Eunil Hahm
- Department of Bioscience and Biotechnology , Konkuk University , Seoul 05029 , Republic of Korea
| | | | - Eun Ji Kang
- Department of Bioscience and Biotechnology , Konkuk University , Seoul 05029 , Republic of Korea
| | - Xuan-Hung Pham
- Department of Bioscience and Biotechnology , Konkuk University , Seoul 05029 , Republic of Korea
| | - Sang Hun Lee
- Department of Bioengineering , University of California Berkeley , Berkeley , California 94720 , United States
| | - Hyung-Mo Kim
- Department of Bioscience and Biotechnology , Konkuk University , Seoul 05029 , Republic of Korea
| | - Dong-Eun Kim
- Department of Bioscience and Biotechnology , Konkuk University , Seoul 05029 , Republic of Korea
| | | | | | - Bong-Hyun Jun
- Department of Bioscience and Biotechnology , Konkuk University , Seoul 05029 , Republic of Korea
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Kamba S, Seto H, Kondo T, Miura Y. Verification of the Universal Versatility of a Quantitative Protein Measurement Technique Using a Metal Mesh Device. ANAL SCI 2018; 34:765-770. [PMID: 29998956 DOI: 10.2116/analsci.17p523] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
When proteins are attached to microstructures such as a metal mesh device, changes in their optical properties occur. These changes have been characterized based on actual measurements in the infrared region of the spectrum. We have previously theoretically and experimentally demonstrated the optical changes associated with streptavidin. Here, we investigate three types of proteins: avidin, BSA, and lysozyme. The three proteins were adsorbed onto three types of metal mesh devices having different resonant frequencies, and the corresponding spectra were measured in the infrared region. The change in the frequency of the dip point in the spectrum was extracted to quantitatively determine the quantity of protein; these results were correlated with the quantitative measurements obtained by electrophoresis. By examining three types of different proteins, it was verified that a variety of proteins can be measured based on the optical characteristics of metal mesh devices.
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Affiliation(s)
| | - Hirokazu Seto
- Department of Chemical Engineering, Fukuoka University
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Abstract
The paper described the hemodynamics of blood flow based on fluid mechanics and its corresponding formulas, and revealed the limitation of blood flow velocity measurement for non-laminar flow when using the conventional pulse wave Doppler. The paper demonstrated the calculation of turbulence for blood flow based on velocity directions and quantified the turbulence according to the presented formulas. Two methods were introduced and the simulated results were analyzed. An example using real data based on ultrasound vector flow imaging for calculating the turbulence of blood flow was presented in the end.
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Affiliation(s)
- Yigang Du
- Shenzhen Mindray Bio-Medical Electronics Co. Ltd., Shenzhen, 518057. ##Email#
| | - Lei Zhu
- Shenzhen Mindray Bio-Medical Electronics Co. Ltd., Shenzhen, 518057. ##Email#
| | - Xujin He
- Shenzhen Mindray Bio-Medical Electronics Co. Ltd., Shenzhen, 518057. ##Email#
| | - Helin Feng
- Shenzhen Mindray Bio-Medical Electronics Co. Ltd., Shenzhen, 518057. ##Email#
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Wah TM, Sourbron S, Wilson DJ, Magee D, Gregory WM, Selby PJ, Buckley DL. Renal Cell Carcinoma Perfusion before and after Radiofrequency Ablation Measured with Dynamic Contrast Enhanced MRI: A Pilot Study. Diagnostics (Basel) 2018; 8:E3. [PMID: 29316711 DOI: 10.3390/diagnostics8010003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 12/28/2017] [Accepted: 01/02/2018] [Indexed: 01/31/2023] Open
Abstract
Aim: To investigate if the early treatment effects of radiofrequency ablation (RFA) on renal cell carcinoma (RCC) can be detected with dynamic contrast enhanced (DCE)-MRI and to correlate RCC perfusion with RFA treatment time. Materials and methods: 20 patients undergoing RFA of their 21 RCCs were evaluated with DCE-MRI before and at one month after RFA treatment. Perfusion was estimated using the maximum slope technique at two independent sittings. Total RCC blood flow was correlated with total RFA treatment time, tumour location, size and histology. Results: DCE-MRI examinations were successfully evaluated for 21 RCCs (size from 1.3 to 4 cm). Perfusion of the RCCs decreased significantly (p < 0.0001) from a mean of 203 (±80) mL/min/100 mL before RFA to 8.1 (±3.1) mL/min/100 mL after RFA with low intra-observer variability (r ≥ 0.99, p < 0.0001). There was an excellent correlation (r = 0.95) between time to complete ablation and pre-treatment total RCC blood flow. Tumours with an exophytic location exhibit the lowest mean RFA treatment time. Conclusion: DCE-MRI can detect early treatment effects by measuring RCC perfusion before and after RFA. Perfusion significantly decreases in the zone of ablation, suggesting that it may be useful for the assessment of treatment efficacy. Pre-RFA RCC blood flow may be used to predict RFA treatment time.
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Wang SK, Guo X, Xiao O, Chen Y, Liu R, Huang W, He M. Qualitative and quantitative assessment of posterior segment optical coherence tomography images using standard photos: the Liwan Eye Study. BMJ Open 2017; 7:e017923. [PMID: 29275341 PMCID: PMC5770917 DOI: 10.1136/bmjopen-2017-017923] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND/AIMS To develop a standardised grading scheme, using standard photos, for spectral-domain ocular coherence tomography (SD-OCT) images of the posterior eye and evaluate the interobserver agreement among trained ophthalmologists in identifying pathological changes. METHODS Subjects were recruited from Liwan District, Guangzhou, with SD-OCT data collection from June 2013 to November 2013 as part of 10-year follow-up visits from the Liwan Eye Study. All subjects underwent SD-OCT imaging of the macula with scanning lines analysed by two ophthalmologists to assess for the presence of 12 different posterior segment lesions. Per cent agreement for each lesion between the graders and quantitative measures of dome-shaped macula (DSM) height and choroidal thickness were calculated. RESULTS A total of 679 SD-OCT images from 679 subjects were independently evaluated by the two graders. Each of the 12 lesions was successfully graded as present or absent in over 96% of images. For all lesions, per cent agreement between observers was over 90%, ranging from 90.7% for epiretinal membranes and retinal pigment epithelium thickenings to 99.7% for full thickness macular holes and retinal detachments. Quantitative measurements of DSM height and choroidal thickness at three locations of the eye all exhibited intraclass correlation scores between the two graders of greater than 0.9. CONCLUSION Our study demonstrates high concordance between graders in characterising posterior segment lesions using SD-OCT images, validating the continued use of this imaging modality in the diagnosis of posterior eye disease.
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Affiliation(s)
- Sean K Wang
- Department of Medicine, Harvard Medical School, Boston, Massachusetts, USA
| | - Xinxing Guo
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Ou Xiao
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Yanxian Chen
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Ran Liu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Wenyong Huang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Mingguang He
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
- Centre for Eye Research Australia; Ophthalmology, Department of Surgery, University of Melbourne, Melbourne, Australia
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Le THH, Tanaka T. Plasmonics-Nanofluidics Hydrid Metamaterial: An Ultrasensitive Platform for Infrared Absorption Spectroscopy and Quantitative Measurement of Molecules. ACS Nano 2017; 11:9780-9788. [PMID: 28945355 DOI: 10.1021/acsnano.7b02743] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
One of the most attractive potentials of plasmonic metamaterials is the amplification of intrinsically weak signals such as molecular infrared absorption or Raman scattering for detection applications. This effect, however, is only effective when target molecules are located at the enhanced electromagnetic field of the plasmonic structures (i.e., hot-spots). It is thus of significance to control the spatial overlapping of molecules and hot-spots, yet it is a long-standing challenge, since it involves the handling of molecules in nanoscale spaces. Here a metamaterial consisting of a nanofluidic channel with a depth of several tens of nanometers sandwiched between plasmonic resonators and a metal film enables the controllable delivery of small molecules into the most enhanced field arising from the quadrupole mode of the structures, forming a plasmon-molecular coupled system. It offers an ultrasensitive platform for detection of IR absorption and molecular sensing. Notably, the precise handling of molecules in a fixed and ultrasmall (10-100 nm) gap also addressed some critical issues in IR spectroscopy such as quantitative measurement and measurement in aqueous solution. Moreover, a drastic change in the reflectance characteristic resulting from the strong coupling between molecules and plasmonic structures indicates that molecules can also be utilized as triggers for actively switching the optical property of metamaterials.
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Affiliation(s)
- Thu H H Le
- Innovative Photon Manipulation Research Team, RIKEN Center for Advanced Photonics , Wako, Saitama 351-0198, Japan
| | - Takuo Tanaka
- Innovative Photon Manipulation Research Team, RIKEN Center for Advanced Photonics , Wako, Saitama 351-0198, Japan
- Metamaterials Laboratory, RIKEN , Wako, Saitama 351-0198, Japan
- Department of Chemical Science and Engineering, Tokyo Institute of Technology , Yokohama, Kanagawa 226-8503, Japan
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Abstract
OBJECTIVE To establish a new method for rapid and quantitative measurement of orbital fat volume based on magnetic resonance imaging (MRI) data. METHODS We collected MRI data from normalized mold and patients with the diagnosis of thyroid-associated ophthalmopathy (TAO). The cross-sectional areas of the orbital fat on each MR image slice were measured to calculate the fat volume on each slice and then the total orbital fat volume. We recorded the time for completing the measurement and assessed the precision, reliability, repeatability and interoperator variations of the results. RESULTS This MRI data-based method allowed precise measurement of the orbital fat volumes with an absolute value of the mean percentage difference <1%. This method was fast and the results showed a good repeatability (with CVs <1%), a high reliability (ICC=0.996, 95%CI: 0.985-0.999) and a high interoperator concordance (95%CI of the Bland-Altman: -0.54-0.90). CONCLUSION The novel method we established for orbital fat volume measurement is rapid, accurate, reliable and reproducible with a low learning cost for clinical use.
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Jeong TD, Cho EJ, Ko DH, Lee W, Chun S, Kwon HJ, Hong KS, Kim YM, Min WK. A new strategy for calculating the risk of ovarian malignancy algorithm (ROMA). Clin Chem Lab Med 2017; 55:1209-1214. [PMID: 28107166 DOI: 10.1515/cclm-2016-0582] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Accepted: 12/05/2016] [Indexed: 11/15/2022]
Abstract
BACKGROUND Reliable quantitative measurements of HE4 and CA125 levels are required to calculate the risk of ovarian malignancy algorithm (ROMA) value. We suggest a new reporting strategy for interpreting ROMA values based on analytical measurement range (AMR) and qualified-intervals of the HE4 and CA125 results. METHODS HE4 and CA125 assays from Abbott and Roche were used. The AMRs and the qualified-intervals were as follows: Architect HE4 assay, 20-1500 and 17.2-2637.8 pmol/L; Architect CA125 II assay, 1-1000 and 3.9-14,163.0 U/mL; Elecsys HE4 assay, 15-1500 and 28.8-3847 pmol/L; Elecsys CA125 II assay, 0.6-5000 and 6.5-5000 U/mL. These values were used to simulate the ROMA values. RESULTS Reporting algorithm for the ROMA value could be classified into three categories. (1) If quantitative HE4 and CA125 levels are reliable, the numerical ROMA value can be reported. (2) If HE4 value is <20 and <28.8 for Abbott and Roche in premenopausal woman, the ROMA value should be reported as "low risk" regardless of the CA125 result. In postmenopausal woman, however, it should be reported as "low risk" (CA125<203.0 and <165.8 for Abbott and Roche) or "undetermined" (vice-versa value). (3) If CA125 value is <3.9 and <6.5 for Abbott and Roche, it should be reported as "low risk" (premenopausal HE4<51.5 and <62.2, postmenopausal HE4<323.0 and <281.5 for Abbott and Roche) or "undetermined" (vice-versa value). CONCLUSIONS New reporting strategy will provide more informative reporting of ROMA values in clinical practice.
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Nakayama G, Fujii T, Murotani K, Uehara K, Hattori N, Hayashi M, Tanaka C, Kobayashi D, Kanda M, Yamada S, Sugimoto H, Koike M, Fujiwara M, Ando Y, Kodera Y. Modified two-dimensional response as surrogate marker of overall survival in patients with metastatic colorectal cancer. Cancer Sci 2017; 107:1492-1498. [PMID: 27479846 PMCID: PMC5084659 DOI: 10.1111/cas.13023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 07/27/2016] [Accepted: 07/28/2016] [Indexed: 12/22/2022] Open
Abstract
The identification of surrogate markers for long‐term outcomes in patients with metastatic colorectal cancer (mCRC) may help in designing treatment regimens. The aim of this study was to assess whether two‐dimensional response (2‐DR) can serve as a new surrogate marker for overall survival (OS) in patients with mCRC. The study group consisted of 99 patients with mCRC from two independent cohorts who were treated with oxaliplatin‐based chemotherapy plus bevacizumab. Two‐dimensional response was defined as an area enclosed by coordinate points, including early tumor shrinkage at 8 weeks, depth of response at nadir, and 20% increase over nadir at progression. Each variable was weighted by its contribution rate to OS. The model was developed and internally validated in the learning cohort, and the performance of this model was externally verified in the validation cohort. Spearman correlation coefficients for 2‐DR and OS in the learning and validation cohorts were 0.593 and 0.661, respectively. The C‐indexes in predicting OS were 0.724 (95% confidence interval, 0.623–0.815) in the learning cohort and 0.762 (95% confidence interval, 0.651–0.873) in the validation cohort. Overall survival was significantly longer in patients with high 2‐DR values than in patients with low 2‐DR values in both the learning (37.0 vs. 24.1 months, P < 0.001) and validation (41.2 vs. 20.4 months, P < 0.001) cohorts. In contrast, differences in early tumor shrinkage and depth of response were not statistically significant. Multivariate analyses showed that 2‐DR was an independent prognostic factor for OS.
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Affiliation(s)
- Goro Nakayama
- Department of Gastroenterological Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan.
| | - Tsutomu Fujii
- Department of Gastroenterological Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Kenta Murotani
- Division of Biostatistics, Clinical Research Center, Aichi Medical University Hospital, Nagakute, Japan
| | - Keisuke Uehara
- Department of Surgical Oncology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Norifumi Hattori
- Department of Gastroenterological Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Masamichi Hayashi
- Department of Gastroenterological Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Chie Tanaka
- Department of Gastroenterological Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Daisuke Kobayashi
- Department of Gastroenterological Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Mitsuro Kanda
- Department of Gastroenterological Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Suguru Yamada
- Department of Gastroenterological Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hiroyuki Sugimoto
- Department of Gastroenterological Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Masahiko Koike
- Department of Gastroenterological Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Michitaka Fujiwara
- Department of Gastroenterological Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yuichi Ando
- Department of Clinical Oncology and Chemotherapy, Nagoya University Hospital, Nagoya, Japan
| | - Yasuhiro Kodera
- Department of Gastroenterological Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Inui H, Sakamoto T, Ito T, Kitahara T. Magnetic resonance volumetric measurement of endolymphatic space in patients without vertiginous or cochlear symptoms. Acta Otolaryngol 2016; 136:1206-1212. [PMID: 27403573 DOI: 10.1080/00016489.2016.1204663] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
CONCLUSION Magnetic resonance volumetric measurement of inner ear endolymphatic space (ELS) was performed in patients without vertiginous or cochlear symptoms. The existence of the ELS in patients with chronic rhinosinusitis (CRS) was shown. The ELS in the cochlea and vestibule was classified into four categories. These findings could be useful as a standard reference for further research. OBJECTIVES To identify normal values of the ELS in the cochlea and vestibule. METHODS Twenty-four patients with CRS were enrolled. Inner ear fluid space images and positive perilymph/positive endolymph images were acquired using a 3.0-tesla unit. Three-dimensional (3-D) images were constructed semi-automatically using both anatomical and tissue information by fusing the 3-D images of the inner ear fluid space and the ELS. RESULTS Among all patients, the mean ELS/the total fluid space (TFS) ratio in the cochlea was 8.8% and that in the vestibule was 16.2%. The ELS in the cochlea and vestibule was classified into four categories. Age-related differences were found in the TFS, ELS, and ELS/TFS ratio in the inner ear and the ELS and ELS/TFS ratio in the vestibule.
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Steinle D, Friedrich L, Bevilacqua N, von Hauff E, Gschwind F. Simple One-Pot Syntheses and Characterizations of Free Fluoride- and Bifluoride-Containing Polymers Soluble in Non-Aqueous Solvents. Materials (Basel) 2016; 9:ma9120965. [PMID: 28774092 PMCID: PMC5456975 DOI: 10.3390/ma9120965] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 11/18/2016] [Accepted: 11/22/2016] [Indexed: 01/15/2023]
Abstract
One of the problems that arise with bifluoride- or fluoride-containing compounds is their poor solubility in non-aqueous solvents. We report herein a facile one-pot synthesis and the chemical analysis of fluoride/bifluoride-containing polymers, which are soluble in MeCN. Different polymers, such as Polyvinylacetate or Polyethylene imine and saccharides, such as maltodextrin, were complexed with ammonium (bi)fluoride using hydrogen bonds to form the desired (bi)fluoride-containing compounds. The newly formed hydrogen bonding (bi)fluoride-doped polymer matrices were analyzed using infrared and nuclear magnetic resonance spectroscopies, and X-ray diffraction. The promising materials also underwent impedance spectroscopy, conductivity measurements and preliminary tests as electrolytes for room temperature fluoride ion batteries along with an analysis of their performance.
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Affiliation(s)
- Dominik Steinle
- Helmholtz Institute Ulm (HIU), Helmholtzstrasse 11, 89081 Ulm, Germany.
| | - Laura Friedrich
- Helmholtz Institute Ulm (HIU), Helmholtzstrasse 11, 89081 Ulm, Germany.
| | - Nico Bevilacqua
- Helmholtz Institute Ulm (HIU), Helmholtzstrasse 11, 89081 Ulm, Germany.
| | - Elizabeth von Hauff
- Department of Physics and Astronomy, VU Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands.
| | - Fabienne Gschwind
- Helmholtz Institute Ulm (HIU), Helmholtzstrasse 11, 89081 Ulm, Germany.
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Saïdi F, Taulelle F, Martineau C. Quantitative (13)C Solid-State NMR Spectra by Multiple-Contact Cross-polarization for Drug Delivery: From Active Principles to Excipients and Drug Carriers. J Pharm Sci 2016; 105:2397-401. [PMID: 27372550 DOI: 10.1016/j.xphs.2016.05.025] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 05/09/2016] [Accepted: 05/24/2016] [Indexed: 10/21/2022]
Abstract
In this contribution, we present an analysis of the main parameters influencing the efficiency of the (1)H → (13)C multiple-contact cross-polarization nuclear magnetic resonance (NMR) experiment in the context of solid pharmaceutical materials. Using the optimum experimental conditions, quantitative (13)C NMR spectra are then obtained for porous metal-organic frameworks (potential drug carriers) and for components present in drug formulations (active principle ingredient and excipients, amorphous or crystalline). Finally, we show that mixtures of components can also be quantified with this method and, hence, that it represents an ideal tool for quantification of pharmaceutical formulations by (13)C cross-polarization under magic-angle spinning NMR in the industry as it is robust and easy to set up, much faster than direct (13)C polarization and is efficient for samples at natural abundance.
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Affiliation(s)
- Fadila Saïdi
- Tectospin, Institut Lavoisier de Versailles, CNRS UMR 8180, Université de Versailles Saint-Quentin en Yvelines, 45 Avenue des Etats-Unis, 78035 Versailles Cedex, France
| | - Francis Taulelle
- Tectospin, Institut Lavoisier de Versailles, CNRS UMR 8180, Université de Versailles Saint-Quentin en Yvelines, 45 Avenue des Etats-Unis, 78035 Versailles Cedex, France
| | - Charlotte Martineau
- Tectospin, Institut Lavoisier de Versailles, CNRS UMR 8180, Université de Versailles Saint-Quentin en Yvelines, 45 Avenue des Etats-Unis, 78035 Versailles Cedex, France; CNRS, CEMHTI UPR3079, Université d'Orléans, F-45071 Orléans, France.
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Kuo WC, Kuo YM, Wen SY. Quantitative and rapid estimations of human sub-surface skin mass using ultra-high-resolution spectral domain optical coherence tomography. J Biophotonics 2016; 9:343-50. [PMID: 25755214 DOI: 10.1002/jbio.201400153] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2014] [Revised: 01/27/2015] [Accepted: 02/16/2015] [Indexed: 05/26/2023]
Abstract
Non-invasive and quantitative estimations for the delineation of sub-surface tumor margins could greatly aid in the early detection and monitoring of the morphological appearances of tumor growth, ensure complete tumor excision without the unnecessary sacrifice of healthy tissue, and facilitate post-operative follow-up for recurrence. In this study, a high-speed, non-invasive, and ultra-high-resolution spectral domain optical coherence tomography (UHR-SDOCT) imaging platform was developed for the quantitative measurement of human sub-surface skin mass. With a proposed robust, semi-automatic analysis, the system can rapidly quantify lesion area and shape regularity by an en-face-oriented algorithm. Various sizes of nylon sutures embedded in pork skin were used first as a phantom to verify the accuracy of our algorithm, and then in vivo, feasibility was proven using benign human angiomas and pigmented nevi. Clinically, this is the first step towards an automated skin lesion measurement system. In vivo optical coherence tomography (OCT) image of angioma (A). Thin red arrows point to a blood vessel (BV).
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Affiliation(s)
- Wen-Chuan Kuo
- Institute of Biophotonics, National Yang-Ming University, Taipei, Taiwan
- Biophotonics & Molecular Imaging Research Center (BMIRC), National Yang-Ming University, Taipei, Taiwan
| | - Yue-Ming Kuo
- Institute of Biophotonics, National Yang-Ming University, Taipei, Taiwan
| | - Su-Ying Wen
- Department of Dermatology, Taipei City Hospital, Renai Branch, Taipei, Taiwan.
- Center for General Education, Mackay Junior College of Medicine, Nursing, and Management.
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Abstract
BACKGROUND While the combination of a glenoid defect and a Hill-Sachs lesion in a shoulder with anterior instability has recently been termed a bipolar lesion, their relationship is unclear. PURPOSE To investigate the relationship of the glenoid defect and Hill-Sachs lesion and the factors that influence the occurrence of these lesions as well as the recurrence of instability. STUDY DESIGN Case-control study; Level of evidence, 3. METHODS The prevalence and size of both lesions were evaluated retrospectively by computed tomography scanning in 153 shoulders before arthroscopic Bankart repair. First, the relationship of lesion prevalence and size was investigated. Then, factors influencing the occurrence of bipolar lesions were assessed. Finally, the influence of these lesions on recurrence of instability was investigated in 103 shoulders followed for a minimum of 2 years. RESULTS Bipolar lesions, isolated glenoid defects/isolated Hill-Sachs lesions, and no lesion were detected in 86, 45, and 22 shoulders (56.2%, 29.4%, and 14.4%), respectively. As the glenoid defect became larger, the Hill-Sachs lesion also increased in size. However, the size of these lesions showed a weak correlation, and large Hill-Sachs lesions did not always coexist with large glenoid defects. The prevalence of bipolar lesions was 33.3% in shoulders with primary instability and 61.8% in shoulders with recurrent instability. In relation to the total events of dislocations/subluxations, the prevalence was 44.2% in shoulders with 1 to 5 events, 69.0% in shoulders with 6 to 10 events, and 82.8% in shoulders with ≥11 events. Regarding the type of sport, the prevalence was 58.9% in athletes playing collision sports, 53.3% in athletes playing contact sports, and 29.4% in athletes playing overhead sports. Postoperative recurrence of instability was 0% in shoulders without lesions, 0% with isolated Hill-Sachs lesions, 8.3% with isolated glenoid defects, and 29.4% with bipolar lesions. The presence of a bipolar lesion significantly influenced the recurrence rate, but lesion size did not. CONCLUSION The prevalence of bipolar lesions was approximately 60%. As glenoid defects became larger, Hill-Sachs lesions also enlarged, but there was no strong correlation. Bipolar lesions were frequent in patients with recurrent instability, patients with repetitive dislocation/subluxation, and those playing collision/contact sports. Instability showed a high recurrence rate in shoulders with bipolar lesions.
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Affiliation(s)
- Shigeto Nakagawa
- Department of Orthopaedic Sports Medicine, Yukioka Hospital, Osaka, Japan
| | - Ritsuro Ozaki
- Department of Orthopaedic Surgery, Toyonaka Municipal Hospital, Osaka, Japan
| | - Yasuhiro Take
- Department of Orthopaedic Surgery, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Ryo Iuchi
- Department of Orthopaedic Sports Medicine, Yukioka Hospital, Osaka, Japan
| | - Tatsuo Mae
- Department of Orthopaedic Surgery, Graduate School of Medicine, Osaka University, Osaka, Japan
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Eguchi R, Takada S. Usefulness of the tri-axial accelerometer for assessing balance function in children. Pediatr Int 2014; 56:753-8. [PMID: 24802955 DOI: 10.1111/ped.12370] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Revised: 02/08/2014] [Accepted: 03/10/2014] [Indexed: 12/01/2022]
Abstract
BACKGROUND The aim of this study was to verify whether the tri-axial accelerometer can be used for quantitatively evaluating balance function in children. METHODS In total, 198 participants, including 172 healthy children aged 3-11 years (87 boys, 85 girls) and 26 young adults aged 21-24 years (seven men, 19 women), were enrolled in this study. The participants undertook three types of balance tasks: quiet standing with eyes open and closed, one-leg standing on the dominant leg and non-dominant leg, and walking on the floor and a balance beam. We derived the root mean square from participants' accelerations measured by the tri-axial accelerometer. RESULTS We found that for quiet standing, one-leg standing, and walking tasks, postural sway decreased with age. Girls controlled their posture better than boys of the same age on all tasks. There was a significant sex difference in quiet standing for children aged 8-9 years. Furthermore, sex differences existed in one-leg standing for children aged 5-11 years. A mild positive correlation was observed between static and dynamic balance. CONCLUSIONS The tri-axial accelerometer is a useful quantitative tool for evaluating both static and dynamic balance function in children. Thus, it has the potential to be used clinically for diagnosis and rehabilitation.
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Affiliation(s)
- Ryota Eguchi
- Graduate School of Health Sciences, Kobe University, Kobe, Japan
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Sasaki M, Kawasaki R, Noonan JE, Wong TY, Lamoureux E, Wang JJ. Quantitative measurement of hard exudates in patients with diabetes and their associations with serum lipid levels. Invest Ophthalmol Vis Sci 2013; 54:5544-50. [PMID: 23847305 DOI: 10.1167/iovs.13-11849] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
PURPOSE To describe a reproducible method of quantifying macular hard exudates (HEs) in diabetic maculopathy and determine the associations of HEs with systemic risk factors. METHODS Patients with diabetes were recruited from a tertiary eye hospital in Melbourne, Australia. Total macular area covered by HEs (total HE area) and the distance from the foveal center to the nearest HE were measured in a semi-automated manner. Associations between HE parameters and diabetic complication risk factors were examined using multiple linear regression models. RESULTS Of 593 participants (mean age 60.5-years old), 97 (16.4%) had HEs in at least one eye, due to diabetic maculopathy. The intraclass correlation coefficients (ICC) for inter- and intra-observer agreements were 0.982 and 0.999, respectively. Total HE area was positively associated with qualitative HE severity scale determined by photographic graders. The median of total HE area was 0.089 mm(2) (interquartile range, 0.027-0.246). The median distance between foveal center and the nearest HE was 791.1 μm (431.9-1385.4). After adjusting for age, sex, duration of diabetes, glycated hemoglobin, mean arterial pressure, diabetic retinopathy level, and use of lipid-lowering medication, low density lipoprotein (LDL) cholesterol (P = 0.009), and triglyceride levels (P = 0.036) were positively associated with total HE area. Higher triglyceride levels were associated with central involvement (P = 0.023). CONCLUSIONS Quantitative measurement of HEs in patients with diabetes is associated with lipid levels, and higher triglyceride levels are associated with a higher risk of central involvement. Quantitative information may be useful to monitor HE progression or treatment response in persons with diabetic maculopathy.
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Affiliation(s)
- Mariko Sasaki
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, Melbourne, Victoria, Australia
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Kitai N, Mukai Y, Murabayashi M, Kawabata A, Washino K, Matsuoka M, Shimizu I, Katsumata A. Measurement accuracy with a new dental panoramic radiographic technique based on tomosynthesis. Angle Orthod 2013; 83:117-126. [PMID: 22612390 PMCID: PMC8805535 DOI: 10.2319/020412-100.1] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Accepted: 03/01/2012] [Indexed: 09/21/2023] Open
Abstract
OBJECTIVE To investigate measurement errors and head positioning effects on radiographs made with new dental panoramic radiograph equipment that uses tomosynthesis. MATERIALS AND METHODS Radiographic images of a simulated human head or phantom were made at standard head positions using the new dental panoramic radiograph equipment. Measurement errors were evaluated by comparing with the true values. The phantom was also radiographed at various alternative head positions. Significant differences between measurement values at standard and alternative head positions were evaluated. Magnification ratios of the dimensions at standard and alternative head positions were calculated. RESULTS The measurement errors were small for all dimensions. On the measurements at 4-mm displacement positions, no dimension was significantly different from the standard value, and all dimensions were within ±5% of the standard values. At 12-mm displacement positions, the magnification ratios for tooth length and mandibular ramus height were within ±5% of the standard values, but those for dental arch width, mandibular width, and mandibular body length were beyond ±5% of the standard values. CONCLUSIONS Measurement errors on radiographs made using the new panoramic radiograph equipment were small in any direction. At 4-mm head displacement positions, no head positioning effect on the measurements was found. At 12-mm head displacement positions, the measurements for vertical dimensions were little affected by head positioning, while those for lateral and anteroposterior dimensions were strongly affected.
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Affiliation(s)
- Noriyuki Kitai
- Department of Orthodontics, School of Dentistry, Asahi University, Gifu, Japan.
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