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Upasani VV, Bartley CE, Bastrom TP, George S, Parent S, Kelly MP, Newton PO. 3D analysis of the preoperative deformity in AIS can be used to guide surgical treatment decisions for selective thoracic fusion. Spine Deform 2024; 12:717-725. [PMID: 38332392 DOI: 10.1007/s43390-024-00827-w] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 01/09/2024] [Indexed: 02/10/2024]
Abstract
PURPOSE To identify 3D measures of scoliosis from preoperative imaging that are associated with optimal radiographic outcomes after selective thoracic fusion (STF) for adolescent idiopathic scoliosis (AIS). METHODS Subjects with primary thoracic curves (Lenke 1-4, B or C modifiers) fused selectively (L1 or above) who had preoperative 3D reconstructions and minimum 2 years of follow-up were included. An optimal outcome at 2 years was defined as having 4 of 5 parameters previously defined in the literature: (1) lumbar curve < 26º, (2) deformity flexibility quotient < 4, (3) C7-CSVL < 2 cm, (4) lumbar prominence < 5º and (5) trunk shift < 1.5 cm. Univariate and CART analyses were performed to identify preoperative variables associated with achieving an optimal outcome 2 years postoperatively. RESULTS Ninety-nine (88F, 11 M) patients met inclusion. Mean age was 15 ± 2 years. Fifty-one subjects (52%) had an optimal outcome. Seven preoperative deformity measures representing smaller thoracolumbar/lumbar deformity in the optimal group were found to be significant on univariate analysis. CART analysis identified the following variables associated with optimal outcomes: difference in apical rotation > 30° = 27% optimal outcomes, difference in apical rotation ≤ 30° and coronal vertebral wedging of lumbar apex > 3° = 46% optimal outcomes, and difference in apical rotation ≤ 30° and coronal vertebral wedging of lumbar apex ≤ 3° = 80% optimal outcomes (p < 0.05). CONCLUSION Optimal outcomes after STF were associated with a preoperative difference in apical vertebral rotation in the axial plane less than 30° between thoracic and lumbar curves as well as coronal plane vertebral wedging of the lumbar apical vertebra less than 3°.
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Affiliation(s)
- Vidyadhar V Upasani
- Division of Orthopedics and Scoliosis, Rady Children's Hospital, 3020 Children's Way, MC 5062, San Diego, CA, 92123, USA.
- Department of Orthopedics, University of California, San Diego, CA, USA.
| | - Carrie E Bartley
- Division of Orthopedics and Scoliosis, Rady Children's Hospital, 3020 Children's Way, MC 5062, San Diego, CA, 92123, USA
| | - Tracey P Bastrom
- Division of Orthopedics and Scoliosis, Rady Children's Hospital, 3020 Children's Way, MC 5062, San Diego, CA, 92123, USA
| | - Stephen George
- 3Department of Orthopedics, Nicklaus Children's Hospital, Miami, FL, USA
| | - Stefan Parent
- Department of Orthopaedics, CHU Sainte-Justine, Montreal, Québec, Canada
- Department of Surgery, University of Montreal, Montréal, Québec, Canada
| | - Michael P Kelly
- Division of Orthopedics and Scoliosis, Rady Children's Hospital, 3020 Children's Way, MC 5062, San Diego, CA, 92123, USA
- Department of Orthopedics, University of California, San Diego, CA, USA
| | - Peter O Newton
- Division of Orthopedics and Scoliosis, Rady Children's Hospital, 3020 Children's Way, MC 5062, San Diego, CA, 92123, USA
- Department of Orthopedics, University of California, San Diego, CA, USA
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Akase H, Okamura T, Nagoshi R, Fujimura T, Miyazaki Y, Takenaka H, Matsuyama T, Murasato Y, Yamawaki M, Ono S, Serikawa T, Hikichi Y, Norita H, Nakao F, Sakamoto T, Shinke T, Yano M, Shite J. Risk Assessment of Side Branch Compromise After Coronary Bifurcation Stenting - A Substudy of the 3D-OCT Bifurcation Registry. Circ J 2023:CJ-22-0723. [PMID: 37839862 DOI: 10.1253/circj.cj-22-0723] [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: 10/17/2023]
Abstract
BACKGROUND Side branch (SB) occlusion during bifurcation stenting is a serious complication. This study aimed to predict SB compromise (SBC) using optical coherence tomography (OCT).Methods and Results: Among the 168 patients who enrolled in the 3D-OCT Bifurcation Registry, 111 bifurcation lesions were analyzed to develop an OCT risk score for predicting SBC. SBC was defined as worsening of angiographic SB ostial stenosis (≥90%) immediately after stenting. On the basis of OCT before stenting, geometric parameters (SB diameter [SBd], length from proximal branching point to carina tip [BP-CT length], and distance of the polygon of confluence [dPOC]) and 3-dimensional bifurcation types (parallel or perpendicular) were evaluated. SBC occurred in 36 (32%) lesions. The parallel-type bifurcation was significantly more frequent in lesions with SBC. The receiver operating characteristic curve indicated SBd ≤1.77 mm (area under the curve [AUC]=0.73, sensitivity 64%, specificity 75%), BP-CT length ≤1.8 mm (AUC=0.83, sensitivity 86%, specificity 68%), and dPOC ≤3.96 mm (AUC=0.68, sensitivity 63%, specificity 69%) as the best cut-off values for predicting SBC. To create the OCT risk score, we assigned 1 point to each of these factors. As the score increased, the frequency of SBC increased significantly (Score 0, 0%; Score 1, 8.7%; Score 2, 28%; Score 3, 58%; Score 4, 85%; P<0.0001). CONCLUSIONS Prediction of SBC using OCT is feasible with high probability.
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Affiliation(s)
- Hideaki Akase
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine
| | - Takayuki Okamura
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine
| | - Ryoji Nagoshi
- Department of Cardiology, Osaka Saiseikai Nakatsu Hospital
| | - Tatsuhiro Fujimura
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine
| | - Yosuke Miyazaki
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine
| | - Hitoshi Takenaka
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine
| | - Tetsuya Matsuyama
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine
| | - Yoshinobu Murasato
- Department of Cardiology, National Hospital Organization Kyusyu Medical Center
| | | | - Shiro Ono
- Department of Cardiology, Saiseikai Yamaguchi General Hospital
| | | | - Yutaka Hikichi
- Department of Cardiovascular Medicine, Saga-Ken Medical Center Koseikan
| | | | - Fumiaki Nakao
- Department of Cardiology, Yamaguchi Grand Medical Center
| | | | - Toshiro Shinke
- Division of Cardiology, Department of Medicine, Showa University School of Medicine
| | - Masafumi Yano
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine
| | - Junya Shite
- Department of Cardiology, Osaka Saiseikai Nakatsu Hospital
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Singh P, Hung K, Ajmera DH, Yeung AWK, von Arx T, Bornstein MM. Morphometric characteristics of the sphenoid sinus and potential influencing factors: a retrospective assessment using cone beam computed tomography (CBCT). Anat Sci Int 2021; 96:544-555. [PMID: 34232466 PMCID: PMC8338843 DOI: 10.1007/s12565-021-00622-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 06/09/2021] [Indexed: 11/27/2022]
Abstract
The present study aimed to evaluate the morphological characteristics of the sphenoid sinus (SS), and the impact of potential influencing factors on the morphometric features using CBCT imaging. CBCT scans of 148 patients, aged between 15 and 85 (32.88 ± 15.33) years were retrospectively evaluated. DICOM files from the CBCT scans were imported into semi-automatic software and the SS of each patient was assessed for the morphological characteristics including configuration, symmetry, extension, shape, septation, volume, and maximum diameter. Furthermore, potential influencing factors such as age, gender, side, and sinus condition were analysed. A significant association was observed between sinus extension and age. Septation was also found to be significantly associated with age, gender and sinus condition. Besides, sinus volume was significantly associated with gender and sinus condition. No significant influence of shape and side on the morphometric features was noticed. The average volume and diameter of the SS were 6576.92 ± 3748.12 mm3 and 30.48 ± 9.28 mm, respectively. In conclusion, the present findings indicate that age, gender and sinus condition have a significant impact on the morphometric characteristics of the SS. Mature sinuses exhibit a post-sellar extension pattern until middle age. In addition, males, and sinuses with healthy sinus condition have larger volumes compared to females and pathological sinuses.
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Affiliation(s)
- Pradeep Singh
- Applied Oral Sciences and Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - Kuofeng Hung
- Oral and Maxillofacial Radiology, Applied Oral Sciences and Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - Deepal Haresh Ajmera
- Orthodontics, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - Andy Wai Kan Yeung
- Oral and Maxillofacial Radiology, Applied Oral Sciences and Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - Thomas von Arx
- Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern, Bern, Switzerland
| | - Michael M Bornstein
- Department of Oral Health & Medicine, University Center for Dental Medicine Basel UZB, University of Basel, Mattenstrasse 40, 4058, Basel, Switzerland.
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Doglietto F, Belotti F, Panciani P, Poliani PL, Fontanella MM. High-Definition 3-Dimensional Exoscope for 5-ALA Glioma Surgery: 3-Dimensional Operative Video. Oper Neurosurg (Hagerstown) 2021; 18:E82. [PMID: 31173153 DOI: 10.1093/ons/opz139] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [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: 09/25/2018] [Accepted: 02/24/2019] [Indexed: 11/12/2022] Open
Abstract
A 54-yr-old man presented with the radiological recurrence of a glioblastoma at the level of the left anterior cingulate gyrus, 46 mo after first surgery, which had been complicated by bone flap infection. Due to the relatively small recurrence, the long survival, and the good neurological status, surgery was warranted. A new, high-definition (4 K) and 3-dimensional exoscope (ORBEYE; Sony Olympus Medical Solutions Inc, Tokyo, Japan) was used during the surgical approach and throughout tumor removal, which was aided by five-aminolevulinic acid (5-ALA) derived fluorescence. The postoperative course was characterized by supplementary motor area syndrome, which quickly improved, leading to a discharge home 1 wk after surgery. Histological examination confirmed a wild-type (WT) IDH1/2, MGMT (DNA repair enzyme O6-methylguanine-DNA methyltransferase) methylated glioblastoma with a proliferative index focally as high as 20%. He is now being considered for a second-line treatment. As recently reported for spinal surgery,1 we believe this technology has significant potential for its small dimension (which can provide optimal positioning even in ergonomically challenging positions), ease of movement, and image quality, including 5-ALA fluorescence. The patient's consent was obtained for publication.
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Affiliation(s)
- Francesco Doglietto
- Neurosurgery, Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Brescia, Italy
| | - Francesco Belotti
- Neurosurgery, Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Brescia, Italy
| | - Pierpaolo Panciani
- Neurosurgery, Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Brescia, Italy
| | - Pietro Luigi Poliani
- Pathology, Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy
| | - Marco Maria Fontanella
- Neurosurgery, Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Brescia, Italy
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Rösler J, Georgiev S, Roethe AL, Chakkalakal D, Acker G, Dengler NF, Prinz V, Hecht N, Faust K, Schneider U, Bayerl S, Czabanka M, Misch M, Onken J, Vajkoczy P, Picht T. Clinical implementation of a 3D4K-exoscope (Orbeye) in microneurosurgery. Neurosurg Rev 2021. [PMID: 34142267 DOI: 10.1007/s10143-021-01577-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [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: 04/15/2021] [Revised: 04/15/2021] [Accepted: 05/26/2021] [Indexed: 11/25/2022]
Abstract
Exoscopic surgery promises alleviation of physical strain, improved intraoperative visualization and facilitation of the clinical workflow. In this prospective observational study, we investigate the clinical usability of a novel 3D4K-exoscope in routine neurosurgical interventions. Questionnaires on the use of the exoscope were carried out. Exemplary cases were additionally video-documented. All participating neurosurgeons (n = 10) received initial device training. Changing to a conventional microscope was possible at all times. A linear mixed model was used to analyse the impact of time on the switchover rate. For further analysis, we dichotomized the surgeons in a frequent (n = 1) and an infrequent (n = 9) user group. A one-sample Wilcoxon signed rank test was used to evaluate, if the number of surgeries differed between the two groups. Thirty-nine operations were included. No intraoperative complications occurred. In 69.2% of the procedures, the surgeon switched to the conventional microscope. While during the first half of the study the conversion rate was 90%, it decreased to 52.6% in the second half (p = 0.003). The number of interventions between the frequent and the infrequent user group differed significantly (p = 0.007). Main reasons for switching to ocular-based surgery were impaired hand–eye coordination and poor depth perception. The exoscope investigated in this study can be easily integrated in established neurosurgical workflows. Surgical ergonomics improved compared to standard microsurgical setups. Excellent image quality and precise control of the camera added to overall user satisfaction. For experienced surgeons, the incentive to switch from ocular-based to exoscopic surgery greatly varies.
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Absalan F, Pasandi MS, Ghasemi Hamidabadi H, Saeednia S, Bojnordi MN, Zahiri M, Alizadeh R, Bagher Z. Matrigel enhances differentiation of human adipose tissue-derived stem cells into dopaminergic neuron. Neurosci Lett 2021; 760:136070. [PMID: 34147538 DOI: 10.1016/j.neulet.2021.136070] [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: 11/22/2020] [Revised: 06/02/2021] [Accepted: 06/15/2021] [Indexed: 11/24/2022]
Abstract
BACKGROUND Therapy based stem cells have offered a novel therapeutic approach for the improvement of neurodegenerative diseases, specially Parkinson. Hence, developing a well-established culture model with appropriate stem cells is extremely crucial in regenerative engineering to provide efficient targeted cells. Human adult mesenchymal stem cells derived from adipose tissue (hADSCs) have emerged as a promising source of stem cells due to their unique potentials of self-renewal and differentiation into other stem cells. The purpose of this study was to investigate the differentiation capacity of hADSCs into dopaminergic and neuron-like cells in the 3D culture plate (Matrigel). METHODS AND MATERIALS hADSCs were obtained from adipose tissues of patients and then characterized morphologically with flowcytometry. Isolated cells were harvested to perform differentiation on Matrigel and tissue culture plate (TCP) supplemented with induction factors. The survival rate of cells during neural induction was monitored by MTT. The expression of specific cell markers was analyzed by QRT-PCR and immunocytochemistry on days 2, 8 and 14. The level of released dopamine was measured using HPLC technique. RESULTS Matrigel had a positive effect on maintaining cell growth compared to those on TCP. Moreover, the number of TH and MAPII positive cells is substantially higher in Matrigel than in TCP. Sox2 and Nestin had a prominent expression in hADSCs within the first days of differentiation. The gene expression of neural markers such as TH, Nurr1, LMX1A and DAT was detected and increased after day 8. Moreover, the dopamine released in the cell harvested on Matrigel was greater than those seeded on TCP. CONCLUSIONS Overall, hADSCs could generate dopaminergic cells, which suggest its strong capability to serve as a tool for Parkinson disease model in the regenerative medicine.
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Affiliation(s)
- Forouzan Absalan
- Medical Faculty, Abadan University of Medical Sciences, Abadan, Iran
| | - Marzieh Sharifi Pasandi
- Immunogenetic Research Center, Department of Anatomy & Cell Biology, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Hatef Ghasemi Hamidabadi
- Immunogenetic Research Center, Department of Anatomy & Cell Biology, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran; Department of Anatomy & Cell Biology, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran.
| | - Sara Saeednia
- Department of Basic Sciences, School of Medicine, Shahroud University of Medical Sciences, Shahroud, Iran
| | - Maryam Nazm Bojnordi
- Immunogenetic Research Center, Department of Anatomy & Cell Biology, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran; Department of Anatomy & Cell Biology, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Maria Zahiri
- Department of Anatomical Sciences, School of Medical Sciences, Bushehr University of Medical Sciences, Bushehr, Iran
| | - Rafieh Alizadeh
- ENT and Head & Neck Research Center and Department, The Five Senses Health Institute, Hazrat Rasoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - Zohreh Bagher
- ENT and Head & Neck Research Center and Department, The Five Senses Health Institute, Hazrat Rasoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
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Huang Z, Qin H, Liao J, Meng L, Qin Y, Li B, Lai H, Mo X. Comparison between 3-dimensional and 2-dimensional endoscopic thyroidectomy for benign and malignant lesions: a meta-analysis. World J Surg Oncol 2021; 19:23. [PMID: 33478479 PMCID: PMC7819346 DOI: 10.1186/s12957-021-02134-4] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Accepted: 01/13/2021] [Indexed: 01/11/2023] Open
Abstract
Background The use of 3-dimensional (3D) endoscopic thyroidectomy (ET) has been increasing, but its feasibility and safety have not been well documented for thyroidectomy. Hence, to systematically investigate the comparative outcomes during 3D-ET and 2-dimensional (2D) ET for benign and malignant lesions, we conducted this meta-analysis. Methods Based on the PRISMA guidelines, a systematic database search of the PubMed, Cochrane Library, Web of Science, China National Knowledge Infrastructure (CNKI), and Chinese Wanfang databases was performed. The eligible studies were published in English and Chinese up to October 2020. The major endpoints evaluated were procedure time, blood loss, postoperative drainage, postoperative hospitalization, postoperative complications, total number of lymph node dissections (LNDs), and total cost. Results A total of 15 relevant studies including 1190 patients (583 for 3D-ET and 607 for 2D-ET) compared the application of 3D and 2D laparoscopic systems in thyroid surgery, of which 8 were endoscopic benign thyroidectomy (EBT) and 7 were endoscopic malignant thyroidectomy (EMT). Our meta-analysis indicated that 3D-ET generally had advantages over 2D-ET in terms of procedure time (P = 0.000), blood loss (P = 0.000), postoperative drainage (P = 0.000), postoperative complications (P = 0.000), and LNDs (P = 0.006). However, there were no significant differences between the two systems in terms of total cost (P = 0.245) or postoperative hospitalization (P = 0.068). Subgroup analysis showed consistency of the overall outcomes in each subset, but a shorter postoperative hospitalization in 3D-EBT was revealed. Conclusions Compared to 2D-ET, 3D endoscopic thyroidectomy is an efficient, safe, and reliable method with better depth perception and stereoscopic vision, and an equally satisfactory outcome. More clinical RCTs with long-term follow-up are required to reproduce these promising results. Supplementary Information The online version contains supplementary material available at 10.1186/s12957-021-02134-4.
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Affiliation(s)
- Zigao Huang
- Guangxi Clinical Research Center for Colorectal Cancer, Guangxi Cancer Hospital and Guangxi Medical University Affiliated Cancer Hospital, Nanning, 530021, Guangxi Autonomous Region, China
| | - Haiquan Qin
- Guangxi Clinical Research Center for Colorectal Cancer, Guangxi Cancer Hospital and Guangxi Medical University Affiliated Cancer Hospital, Nanning, 530021, Guangxi Autonomous Region, China
| | - Jiankun Liao
- Guangxi Clinical Research Center for Colorectal Cancer, Guangxi Cancer Hospital and Guangxi Medical University Affiliated Cancer Hospital, Nanning, 530021, Guangxi Autonomous Region, China
| | - Linghou Meng
- Guangxi Clinical Research Center for Colorectal Cancer, Guangxi Cancer Hospital and Guangxi Medical University Affiliated Cancer Hospital, Nanning, 530021, Guangxi Autonomous Region, China
| | - Yongjie Qin
- Guangxi Clinical Research Center for Colorectal Cancer, Guangxi Cancer Hospital and Guangxi Medical University Affiliated Cancer Hospital, Nanning, 530021, Guangxi Autonomous Region, China
| | - Baojia Li
- Guangxi Clinical Research Center for Colorectal Cancer, Guangxi Cancer Hospital and Guangxi Medical University Affiliated Cancer Hospital, Nanning, 530021, Guangxi Autonomous Region, China
| | - Hao Lai
- Guangxi Clinical Research Center for Colorectal Cancer, Guangxi Cancer Hospital and Guangxi Medical University Affiliated Cancer Hospital, Nanning, 530021, Guangxi Autonomous Region, China
| | - Xianwei Mo
- Guangxi Clinical Research Center for Colorectal Cancer, Guangxi Cancer Hospital and Guangxi Medical University Affiliated Cancer Hospital, Nanning, 530021, Guangxi Autonomous Region, China.
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Zhao S, Min S, Wu P, Huang C, Zhao Q, Chen B, Shi B. Structure of Lumbar Intervertebral Foraminal Ligaments Based on 3-Dimensional Reconstruction Through Ultrathin Cryomilling of a Human Cadaver. World Neurosurg 2021; 148:e609-e616. [PMID: 33482412 DOI: 10.1016/j.wneu.2021.01.032] [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: 12/11/2020] [Revised: 01/10/2021] [Accepted: 01/10/2021] [Indexed: 10/22/2022]
Abstract
BACKGROUND This study aimed to assess the feasibility of using the 3-dimensional (3-D) reconstruction technique based on ultrathin cryomilling to show the lumbar intervertebral foraminal ligaments in situ. METHODS Cryomilling was performed on an embalmed human cadaver to acquire successive cross-sectional images. In each of the images, the boundaries of lumbar intervertebral foraminal ligaments and their adjacent structures were outlined, labeled, and reconstructed for 3-D modeling. The morphology, attachments, and spatial orientation of ligaments were described. RESULTS A total of 9 ligaments in 10 lumbar intervertebral foramina (IVFs) were identified and reconstructed. These ligaments can be divided into 5 types. The IVFs were divided into 2 or 3 main portions by the first 4 types of ligaments (transforaminal ligaments, corporotransverse ligaments, "reticular" ligaments, and "Y-shaped" ligaments). The radiating ligaments (the fifth type of ligaments) attached to the surrounding structures of the IVF and were connected directly to the nerve root sleeves. Although there was no indication of neurovascular compromise in this normal specimen, these ligaments limit the space within the bony IVF such that under certain pathologic conditions (e.g., inflammation), their presence would make neurovascular compression more likely than if they were absent. CONCLUSIONS The 3-D reconstruction technique based on ultrathin cryomilling can effectively show the lumbar intervertebral foraminal ligaments and their anatomical characteristics in situ, providing a new way to clarify the relationships between these ligaments and their adjacent structures.
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Affiliation(s)
- Shengli Zhao
- Department of Spine Surgery, First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Shaoxiong Min
- Department of Spine Surgery, Peking University Shenzhen Hospital, Shenzhen, China
| | - Penghuan Wu
- Department of Spine Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Chengyan Huang
- Department of Radiology, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Qinghao Zhao
- Department of Orthopedics, Third Affiliated Hospital of Southern Medical University, Guangzhou, China
| | - Bailing Chen
- Department of Spine Surgery, First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Benchao Shi
- Department of Spine Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China.
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Chandarana K, Caruana EJ. In patients undergoing video-assisted thoracic surgery for lung resection, does three-dimensional endoscopic vision provide superior clinical outcomes? Interact Cardiovasc Thorac Surg 2020; 30:588-592. [PMID: 31800043 DOI: 10.1093/icvts/ivz293] [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: 04/25/2019] [Revised: 09/08/2019] [Accepted: 10/27/2019] [Indexed: 11/13/2022] Open
Abstract
A best evidence topic in thoracic surgery was written according to a structured protocol. The question addressed was whether the use of 3-dimensional endoscopic vision provides superior clinical outcomes to patients undergoing video-assisted thoracic surgery for lung resection. Altogether 231 unique papers were found using the reported search, of which 6 represented the best evidence to answer the clinical question. The authors, journal, date and country of publication, patient group studied, study type, relevant outcomes and results of these papers are tabulated. Four of the 6 papers demonstrated a statistically significant reduction in operative time, although this difference may not be of sufficient magnitude to be relevant clinically. There was no difference in any other outcomes assessed. We therefore conclude that, in patients undergoing video-assisted thoracic surgery for lung resection, 3-dimensional endoscopic vision has no demonstrable impact on perioperative or oncological outcomes, or cost, although it may reduce operative time.
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Affiliation(s)
| | - Edward J Caruana
- Department of Thoracic Surgery, Glenfield Hospital, Leicester, UK.,NIHR Biomedical Research Centre, University of Nottingham, Nottingham, UK
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Bickerton R, Ahmed S, Kholief A, Nassimizadeh AK. Breadth and Depth: Three-Dimensional Endoscopic Field of View: Two-Dimensional Versus Three-Dimensional Endoscopic Field of View. World Neurosurg 2019; 127:e717-e721. [PMID: 30947003 DOI: 10.1016/j.wneu.2019.03.247] [Citation(s) in RCA: 3] [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: 02/18/2019] [Revised: 03/22/2019] [Accepted: 03/23/2019] [Indexed: 11/26/2022]
Abstract
BACKGROUND Three-dimensional (3D) endoscopy is an emerging tool in ear-nose-throat (ENT) and skull base surgery with the benefit of providing real-time depth perception. Several investigators have reported that the field of view (FOV) is reduced in 3D endoscopes compared with regular 2-dimensional (2D) endoscopes. Thus, we objectively compared the FOV of 2D and 3D endoscopes. METHODS Using a standard 2D and 2 different 3D ENT endoscopes, images were captured of 1-mm graph paper from a set distance of 6 cm. The FOV was calculated from these images and compared among the endoscopes. RESULTS The VisionSense 3D endoscope had a slightly smaller FOV (9.1 cm vs. 10.1 cm; -9.9%), and the Karl Storz 3D endoscope showed a slightly larger FOV (10.4 cm vs. 10.1 cm; +3.0%). However, the results were complicated by the different-shaped images produced by the 3D endoscopes. CONCLUSION The differences in the FOV between the 2D and 3D endoscopes used in ENT surgery were not clinically significant. Thus, the FOV should not be considered a limitation of 3D technology.
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Affiliation(s)
- Robert Bickerton
- College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom.
| | - Shahzada Ahmed
- Department of Ear, Nose and Throat (ENT) Surgery, University Hospitals Birmingham NHS Foundation, Birmingham, United Kingdom
| | - Amr Kholief
- Department of Ear, Nose and Throat (ENT) Surgery, University Hospitals Birmingham NHS Foundation, Birmingham, United Kingdom; Department of Otolaryngology - Head and Neck Surgery, Alexandria University, Alexandria, Egypt
| | - Abdul-Karim Nassimizadeh
- Department of Ear, Nose and Throat (ENT) Surgery, Walsall Healthcare National Health Service Trust, Walsall, United Kingdom
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Akand M, Civcik L, Buyukaslan A, Altintas E, Kocer E, Koplay M, Erdogru T. Feasibility of a novel technique using 3-dimensional modeling and augmented reality for access during percutaneous nephrolithotomy in two different ex-vivo models. Int Urol Nephrol 2018; 51:17-25. [PMID: 30474783 DOI: 10.1007/s11255-018-2037-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [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: 09/17/2018] [Accepted: 11/19/2018] [Indexed: 10/27/2022]
Abstract
PURPOSE We describe a novel technique that uses mathematical calculation software, 3-dimensional (3D) modeling and augmented reality (AR) technology for access during percutaneous nephrolithotomy (PCNL) and report our first preliminary results in two different ex-vivo models. METHODS Novel software was created in order to calculate access point and angle by using pre-operative computed tomography (CT) obtained in 50 patients. Two scans, 27 s and 10 min after injection of contrast agent, were taken in prone PCNL position. By using DICOM objects, mathematical and software functions were developed to measure distance of stone from reference electrodes. Vectoral 3D modeling was performed to calculate the access point, direction angle and access angle. With specific programs and AR, 3D modeling was placed virtually onto real object, and the calculated access point and an access needle according to the calculated direction angle and access angle were displayed virtually on the object on the screen of tablet. RESULTS The system was tested on two different models-a stone placed in a gel cushion, and a stone inserted in a bovine kidney that was placed in a chicken-for twice, and correct access point and angle were achieved at every time. Accuracy of insertion of needle was checked by feeling crepitation on stone surface and observing tip of needle touching stone in a control CT scan. CONCLUSIONS This novel device, which uses software-based mathematical calculation, 3D modeling and AR, seems to ensure a correct access point and angle for PCNL. Further research is required to test its accuracy and safety in humans.
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Affiliation(s)
- Murat Akand
- School of Medicine, Department of Urology, Selcuk University, Konya, Turkey. .,Selçuk Üniversitesi, Alaeddin Keykubat Kampüsü, Tıp Fakültesi Hastanesi, E-Blok, Kat:1, Üroloji Polikliniği, Selçuklu, 42075, Konya, Turkey.
| | - Levent Civcik
- Higher School of Vocational and Technical Sciences, Department of Computer Technologies, Selcuk University, Konya, Turkey
| | | | - Emre Altintas
- School of Medicine, Department of Urology, Selcuk University, Konya, Turkey
| | - Erdinc Kocer
- Technical Education Faculty, Department of Electronic and Computer Education, Selcuk University, Konya, Turkey
| | - Mustafa Koplay
- School of Medicine, Department of Radiology, Selcuk University, Konya, Turkey
| | - Tibet Erdogru
- UroKlinik -Center of Excellence in Urology, Istanbul, Turkey
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Kihlström Burenstam Linder L, Birgersson U, Lundgren K, Illies C, Engstrand T. Patient-Specific Titanium-Reinforced Calcium Phosphate Implant for the Repair and Healing of Complex Cranial Defects. World Neurosurg 2018; 122:e399-e407. [PMID: 30342265 DOI: 10.1016/j.wneu.2018.10.061] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [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: 08/17/2018] [Accepted: 10/08/2018] [Indexed: 10/28/2022]
Abstract
BACKGROUND The reconstruction of complex cranial defects is challenging and is associated with a high complication rate. The development of a patient-specific, titanium-reinforced, calcium phosphate-based (CaP-Ti) implant with bone regenerative properties has previously been described in 2 case studies with the hypothesis that the implant may improve clinical outcome. OBJECTIVE To identify whether the introduction of CaP-Ti implant has the potential to improve clinical outcome. METHODS A retrospective review of all patients having undergone CaP-Ti cranioplasty was conducted. Comprehensive clinical data were collected from the hospital computer database and patient records. Bone formation and osseointegration were analyzed in a single retrieval specimen. RESULTS Fifty patients, with 52 cranial defects, met the inclusion criteria. The patient cohort displayed a previous failure rate of 64% (32/50) with autologous bone, alloplastic materials, or both. At a median follow-up time of 25 months, the explantation rate due to either early postoperative infection or persistent wound dehiscence was 1.9% (1/53) or 3.8% (2/53), respectively. Surgical intervention with local wound revision was required in 2 patients without the need of implant removal. One patient had a brain tumor recurrence, and the implant was explanted 31 months after implantation. Histologic examination showed that the entire implant was partly yet evenly transformed into vascularized compact bone. CONCLUSION In the present study the CaP-Ti implant appears to have improved the clinical outcomes in a cohort of patients with a high rate of previous cranioplasty failures. The bone regenerative effect may in particular have an impact on the long-term success rate of the implant.
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Affiliation(s)
- Lars Kihlström Burenstam Linder
- Department of Neurosurgery, Clinical Neurosciences, Karolinska University Hospital and Karolinska Institutet, Stockholm, Sweden.
| | - Ulrik Birgersson
- Department of Clinical Science, Intervention and Technology, Division of Imaging and Technology, Karolinska Institutet, Huddinge, Sweden
| | - Kalle Lundgren
- Department of Molecular Medicine and Surgery, Unit for Craniofacial diseases, Karolinska University Hospital and Karolinska Institutet, Stockholm, Sweden
| | - Christopher Illies
- Department of Clinical Pathology, Karolinska University Hospital, Stockholm, Sweden
| | - Thomas Engstrand
- Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
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Acker G, Schlinkmann N, Piper SK, Onken J, Vajkoczy P, Picht T. Stereoscopic Versus Monoscopic Viewing of Aneurysms: Experience of a Single Institution with a Novel Stereoscopic Viewing System. World Neurosurg 2018; 119:e491-e501. [PMID: 30075257 DOI: 10.1016/j.wneu.2018.07.189] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 07/21/2018] [Accepted: 07/23/2018] [Indexed: 11/18/2022]
Abstract
OBJECTIVE Stereoscopic viewing of computed tomographic angiography (CT-A) or magnetic resonance angiograms might increase the diagnostic potential of these imaging techniques. Our aim was to evaluate the benefits of a novel stereoscopic viewing system for aneurysm detection compared with standard monoscopic viewing. METHODS Retrospective patient data were used for 2 different evaluations. First, monoscopic and stereoscopic CT-A viewing was compared by 14 clinicians in 10 patients with challenging (i.e., small and initially CT-A negative) aneurysms. Second, stereoscopic CT-As and the reference standard, digital subtraction angiography (DSA), were compared in 15 patients with randomly selected aneurysms by 12 clinicians. The study participants rated the presence and location of any aneurysm and its morphological characteristics. The detection rates and interrater reliability were calculated. RESULTS The first evaluation showed superior aneurysm detection in challenging cases using stereoscopic versus monoscopic CT-A viewing (median: monoscopic, 20%; interquartile range [IQR], 10%-32.5%; stereoscopic, 40%; IQR, 27.5%-42.5%). The interrater reliability analysis revealed good to excellent agreement among raters for aneurysm detection in both viewing modalities (monoscopic, intraclass correlation coefficient [ICC(2,1)], 0.798; 95% confidence interval [CI], 0.549-0.941; stereoscopic viewing, ICC(2,1), 0.895; 95% CI, 0.770-0.968). The second part demonstrated that stereoscopic CT-A viewing is comparable to DSA viewing for aneurysm detection (median: DSA, 80%; IQR, 73%-100%; stereoscopic CT-A, 87%; IQR, 87%-93%). The interrater reliability analysis revealed excellent absolute agreement in aneurysm detection between DSA and stereoscopic CT-A viewing (DSA: ICC(2,1), 0.971; 95% CI, 0.944-0.989; stereoscopic CT-A: ICC(2,1), 0.972; 95% CI, 0.945-0.989). The aneurysm detection rates correlated significantly with the participants' years of experience. CONCLUSIONS Stereoscopic viewing of CT-As increases the diagnostic accuracy and represents a promising technique to reduce the need for invasive DSA.
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Affiliation(s)
- Güliz Acker
- Department of Neurosurgery and Center for Stroke Research Berlin, Charité-Universitätsmedizin Berlin, Berlin, Germany; Berlin Institute of Health, Berlin, Germany
| | - Nicolas Schlinkmann
- Department of Neurosurgery and Center for Stroke Research Berlin, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Sophie Käthe Piper
- Institute of Biometry and Clinical Epidemiology, Charité-Universitätsmedizin Berlin, Berlin, Germany; Berlin Institute of Health, Berlin, Germany
| | - Julia Onken
- Department of Neurosurgery and Center for Stroke Research Berlin, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Peter Vajkoczy
- Department of Neurosurgery and Center for Stroke Research Berlin, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Thomas Picht
- Department of Neurosurgery and Center for Stroke Research Berlin, Charité-Universitätsmedizin Berlin, Berlin, Germany; Exzellenzcluster Bild Wissen Gestaltung, Humboldt Universität zu Berlin, Berlin, Germany.
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Zhang LL, Chen Q, Wang HL, Xu HZ, Tian NF. Feasibility of Modified Anterior Odontoid Screw Fixation: Analysis of a New Trajectory Using 3-Dimensional Simulation Software. World Neurosurg 2018; 116:e211-6. [PMID: 29729457 DOI: 10.1016/j.wneu.2018.04.166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Revised: 04/20/2018] [Accepted: 04/21/2018] [Indexed: 11/21/2022]
Abstract
BACKGROUND Anterior odontoid screw fixation (AOSF) has been suggested as the optimal treatment for type II and some shallow type III odontoid fractures. However, only the classical surgical trajectory is available; no newer entry points or trajectories have been reported. METHODS We evaluated the anatomic feasibility of a new trajectory for AOSF using 3-dimensional (3D) screw insertion simulation software (Mimics). Computed tomography (CT) scans of patients (65 males and 59 females) with normal cervical structures were obtained consecutively, and the axes were reconstructed in 3 dimensions by Mimics software. Then simulated operations were performed using 2 new entry points below the superior articular process using bilateral screws of different diameters (group 1: 4 mm and 4 mm; group 2: 4 mm and 3.5 mm; group 3: 3.5 mm and 3.5 mm). The success rates and the required screw lengths were recorded and analyzed. RESULTS The success rates were 79.03% for group 1, 95.16% for group 2, and 98.39% for group 3. The success rates for groups 2 and 3 did not differ significantly, and both were significantly better than the rate for group 1. The success rate was much higher in males than in females in group 1, but the success rate was similar in males and females in the other 2 groups. Screw lengths did not differ significantly among the 3 groups, but an effect of sex was apparent. CONCLUSIONS Our modified trajectory is anatomically feasible for fixation of anterior odontoid fractures, but further anatomic experiments and clinical research are needed.
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Hoffman RM, Freeman AE. In Vivo-Like Growth Patterns of Multiple Types of Tumors in Gelfoam ® Histoculture. Methods Mol Biol 2018; 1760:19-28. [PMID: 29572790 DOI: 10.1007/978-1-4939-7745-1_3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Diverse human tumors obtained directly from surgery or biopsy can grow at high frequency in 3-dimensional Gelfoam® histoculture for long periods of time and still maintain many of their in vivo properties. The in vivo properties maintained in vitro include 3-dimensional growth; maintenance of tissue organization and structure, such as changes associated with oncogenic transformation; retention of differentiated function; tumorigenicity; and growth of multiple types of cells from a single tumor.
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Holbek S, Hansen KL, Bouzari H, Ewertsen C, Stuart MB, Thomsen C, Nielsen MB, Jensen JA. Common Carotid Artery Flow Measured by 3-D Ultrasonic Vector Flow Imaging and Validated with Magnetic Resonance Imaging. Ultrasound Med Biol 2017; 43:2213-2220. [PMID: 28711283 DOI: 10.1016/j.ultrasmedbio.2017.06.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [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: 03/16/2017] [Revised: 05/22/2017] [Accepted: 06/05/2017] [Indexed: 06/07/2023]
Abstract
Ultrasound (US) examination of the common carotid artery was compared with a through-plane magnetic resonance imaging (MRI) sequence to validate a recently proposed technique for 3-D US vector flow imaging. Data from the first volunteer examined were used as the training set, before volume flow and peak velocities were calculated for the remaining eight volunteers. Peak systolic velocities (PSVs) and volume flow obtained with 3-D US were, on average, 34% higher and 24% lower than those obtained with MRI, respectively. A high correlation was observed for PSV (r = 0.79), whereas a lower correlation was observed for volume flow (r = 0.43). The overall standard deviations were ±5.7% and ±5.7% for volume flow and PSV with 3-D US, compared with ±2.7% and ±3.2% for MRI. Finally, the data were re-processed with a change in the parameter settings for the echo-canceling filter to investigate its influence on overall performance. PSV was less affected by the re-processing, whereas the difference in volume flow between 3-D vector flow imaging and MRI was reduced to -9%, and with an improved overall standard deviation of ±4.7%. The results illustrate the feasibility of using 3-D US for precise and angle-independent volume flow and PSV estimation in vivo.
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Affiliation(s)
- Simon Holbek
- Center for Fast Ultrasound Imaging, Department of Electrical Engineering, Technical University of Denmark, Lyngby, Denmark.
| | | | - Hamed Bouzari
- Center for Fast Ultrasound Imaging, Department of Electrical Engineering, Technical University of Denmark, Lyngby, Denmark
| | - Caroline Ewertsen
- Department of Radiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Matthias Bo Stuart
- Center for Fast Ultrasound Imaging, Department of Electrical Engineering, Technical University of Denmark, Lyngby, Denmark
| | - Carsten Thomsen
- Department of Radiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | | | - Jørgen Arendt Jensen
- Center for Fast Ultrasound Imaging, Department of Electrical Engineering, Technical University of Denmark, Lyngby, Denmark
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Satriano A, Heydari B, Narous M, Exner DV, Mikami Y, Attwood MM, Tyberg JV, Lydell CP, Howarth AG, Fine NM, White JA. Clinical feasibility and validation of 3D principal strain analysis from cine MRI: comparison to 2D strain by MRI and 3D speckle tracking echocardiography. Int J Cardiovasc Imaging 2017; 33:1979-1992. [PMID: 28685315 PMCID: PMC5698377 DOI: 10.1007/s10554-017-1199-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [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: 01/05/2017] [Accepted: 06/22/2017] [Indexed: 11/29/2022]
Abstract
Two-dimensional (2D) strain analysis is constrained by geometry-dependent reference directions of deformation (i.e. radial, circumferential, and longitudinal) following the assumption of cylindrical chamber architecture. Three-dimensional (3D) principal strain analysis may overcome such limitations by referencing intrinsic (i.e. principal) directions of deformation. This study aimed to demonstrate clinical feasibility of 3D principal strain analysis from routine 2D cine MRI with validation to strain from 2D tagged cine analysis and 3D speckle tracking echocardiography. Thirty-one patients undergoing cardiac MRI were studied. 3D strain was measured from routine, multi-planar 2D cine SSFP images using custom software designed to apply 4D deformation fields to 3D cardiac models to derive principal strain. Comparisons of strain estimates versus those by 2D tagged cine, 2D non-tagged cine (feature tracking), and 3D speckle tracking echocardiography (STE) were performed. Mean age was 51 ± 14 (36% female). Mean LV ejection fraction was 66 ± 10% (range 37–80%). 3D principal strain analysis was feasible in all subjects and showed high inter- and intra-observer reproducibility (ICC range 0.83–0.97 and 0.83–0.98, respectively—p < 0.001 for all directions). Strong correlations of minimum and maximum principal strain were respectively observed versus the following: 3D STE estimates of longitudinal (r = 0.81 and r = −0.64), circumferential (r = 0.76 and r = −0.58) and radial (r = −0.80 and r = 0.63) strain (p < 0.001 for all); 2D tagged cine estimates of longitudinal (r = 0.81 and r = −0.81), circumferential (r = 0.87 and r = −0.85), and radial (r = −0.76 and r = 0.81) strain (p < 0.0001 for all); and 2D cine (feature tracking) estimates of longitudinal (r = 0.85 and −0.83), circumferential (r = 0.88 and r = −0.87), and radial strain (r = −0.79 and r = 0.84, p < 0.0001 for all). 3D principal strain analysis is feasible using routine, multi-planar 2D cine MRI and shows high reproducibility with strong correlations to 2D conventional strain analysis and 3D STE-based analysis. Given its independence from geometry-related directions of deformation this technique may offer unique benefit for the detection and prognostication of myocardial disease, and warrants expanded investigation.
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Affiliation(s)
- Alessandro Satriano
- Stephenson Cardiac Imaging Centre, University of Calgary, Suite 0700 Foothills Medical Centre - 1403 29th St NW, Calgary, AB, T2N 2T9, Canada.,Division of Cardiology, Department of Cardiac Sciences, Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, AB, Canada
| | - Bobak Heydari
- Stephenson Cardiac Imaging Centre, University of Calgary, Suite 0700 Foothills Medical Centre - 1403 29th St NW, Calgary, AB, T2N 2T9, Canada.,Division of Cardiology, Department of Cardiac Sciences, Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, AB, Canada
| | - Mariam Narous
- Division of Cardiology, Department of Cardiac Sciences, Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, AB, Canada
| | - Derek V Exner
- Division of Cardiology, Department of Cardiac Sciences, Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, AB, Canada
| | - Yoko Mikami
- Stephenson Cardiac Imaging Centre, University of Calgary, Suite 0700 Foothills Medical Centre - 1403 29th St NW, Calgary, AB, T2N 2T9, Canada
| | - Monica M Attwood
- Division of Cardiology, Department of Cardiac Sciences, Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, AB, Canada
| | - John V Tyberg
- Division of Cardiology, Department of Cardiac Sciences, Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, AB, Canada
| | - Carmen P Lydell
- Stephenson Cardiac Imaging Centre, University of Calgary, Suite 0700 Foothills Medical Centre - 1403 29th St NW, Calgary, AB, T2N 2T9, Canada.,Department of Diagnostic Imaging, University of Calgary, Calgary, AB, Canada
| | - Andrew G Howarth
- Stephenson Cardiac Imaging Centre, University of Calgary, Suite 0700 Foothills Medical Centre - 1403 29th St NW, Calgary, AB, T2N 2T9, Canada.,Division of Cardiology, Department of Cardiac Sciences, Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, AB, Canada
| | - Nowell M Fine
- Division of Cardiology, Department of Cardiac Sciences, Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, AB, Canada
| | - James A White
- Stephenson Cardiac Imaging Centre, University of Calgary, Suite 0700 Foothills Medical Centre - 1403 29th St NW, Calgary, AB, T2N 2T9, Canada. .,Division of Cardiology, Department of Cardiac Sciences, Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, AB, Canada.
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de Muinck Keizer RJO, Lechner KM, Mulders MAM, Schep NWL, Eygendaal D, Goslings JC. Three-dimensional virtual planning of corrective osteotomies of distal radius malunions: a systematic review and meta-analysis. Strategies Trauma Limb Reconstr 2017; 12:77-89. [PMID: 28444580 DOI: 10.1007/s11751-017-0284-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Accepted: 04/03/2017] [Indexed: 11/03/2022] Open
Abstract
The purpose of this study was to summarize and evaluate results of three-dimensional (3D-) planned corrective osteotomies of malunited distal radius fractures. 3D-planning techniques provide the possibility to address 3D-deformity that conventional planning methods might not address. We systematically searched PubMed, EMBASE and the Cochrane library for studies that performed a 3D-planned corrective osteotomy on patients with a malunited distal radius fracture. Fifteen studies with a total of 68 patients were included in the analysis. In 96% of cases, the preoperatively present palmar tilt, radial inclination and ulnar variance showed statistically significant improvement postoperatively with restoration to within 5° or 2 mm of their normal values. Mean flexion–extension, pro-supination and grip strength showed statistically significant improvement (p < 0.05). Complications were reported in 11 out of 68 patients (16%). With the current advances in 3D printing technology, 3D-planned corrective osteotomies seem a promising technique in the treatment of complex distal radius malunions. Level of evidence IV Systematic review of case series, Level IV.
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González SJ, Mooney B, Lin HY, Zhao X, Kiluk JV, Khakpour N, Laronga C, Lee MC. 2-D and 3-D Ultrasound for Tumor Volume Analysis: A Prospective Study. Ultrasound Med Biol 2017; 43:775-781. [PMID: 28187928 DOI: 10.1016/j.ultrasmedbio.2016.12.009] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 12/12/2016] [Accepted: 12/14/2016] [Indexed: 06/06/2023]
Abstract
Ultrasound (US) allows real-time tumor assessment. We evaluated the volumetric limits of 2-D and 3-D US, compared with magnetic resonance imaging (MRI), with a prospective institutional review board-approved clinical evaluation of US-to-MRI volumetric correlation. US images of pre- and post-neoadjuvant breast cancers were obtained. Volume discrepancy was evaluated with the non-parametric Wilcoxon signed-rank test. Expected inter-observer variability <14% was evaluated as relative paired difference (RPD); clinical relevance was gauged with the volumetric standard error of the mean (SEM). For 42 patients, 133 of 170 US examinations were evaluable. For tumors ≤20 cm3, both highly correlated to MRI with RPD within inter-observer variability and Pearson's correlation up to 0.86 (0.80 before and 0.86 after neoadjuvant chemotherapy, respectively). Lesions 20-40 cm3 had US-to-MRI discrepancy within inter-observer variability for 2-D (RPD: 13%), but not 3-D (RPD: 27%) US (SEM: 1.47 cm3 for 2-D, SEM: 2.28 cm3 for 3-D), suggesting clinical utility. Tumors >40 cm3 correlated poorly. Tumor volumes ≤20 cm3 exhibited a good correlation to MRI. Studies of clinical applications are warranted.
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Affiliation(s)
- Segundo J González
- Comprehensive Breast Program, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA
| | - Blaise Mooney
- Diagnostic Breast Imaging, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA
| | - Hui-Yi Lin
- Biostatistics and Bioinformatics, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA
| | - Xiuhua Zhao
- Biostatistics and Bioinformatics, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA
| | - John V Kiluk
- Comprehensive Breast Program, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA
| | - Nazanin Khakpour
- Comprehensive Breast Program, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA
| | - Christine Laronga
- Comprehensive Breast Program, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA
| | - M Catherine Lee
- Comprehensive Breast Program, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA.
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Abstract
A brain-computer interface (BCI) offers movement-free control of a computer application and is achieved by reading and translating the cortical activity of the brain into semantic control signals. Motion-onset visual evoked potentials (mVEP) are neural potentials employed in BCIs and occur when motion-related stimuli are attended visually. mVEP dynamics are correlated with the position and timing of the moving stimuli. To investigate the feasibility of utilizing the mVEP paradigm with video games of various graphical complexities including those of commercial quality, we conducted three studies over four separate sessions comparing the performance of classifying five mVEP responses with variations in graphical complexity and style, in-game distractions, and display parameters surrounding mVEP stimuli. To investigate the feasibility of utilizing contemporary presentation modalities in neurogaming, one of the studies compared mVEP classification performance when stimuli were presented using the oculus rift virtual reality headset. Results from 31 independent subjects were analyzed offline. The results show classification performances ranging up to 90% with variations in conditions in graphical complexity having limited effect on mVEP performance; thus, demonstrating the feasibility of using the mVEP paradigm within BCI-based neurogaming.
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Affiliation(s)
- R Beveridge
- Intelligent Systems Research Centre, Ulster University, Derry, Northern Ireland, United Kingdom.
| | - S Wilson
- Intelligent Systems Research Centre, Ulster University, Derry, Northern Ireland, United Kingdom
| | - D Coyle
- Intelligent Systems Research Centre, Ulster University, Derry, Northern Ireland, United Kingdom
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Pandey V, Bhutia O, Nagori SA, Seith A, Roychoudhury A. Management of mandibular angle fractures using a 1.7 mm 3-dimensional strut plate. J Oral Biol Craniofac Res 2016; 6:35-40. [PMID: 26937367 DOI: 10.1016/j.jobcr.2015.11.001] [Citation(s) in RCA: 5] [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: 09/15/2015] [Accepted: 11/05/2015] [Indexed: 10/22/2022] Open
Abstract
AIM We report our experience with the use of 1.7 mm 3-dimentional (3D) strut plate for the management of mandibular angle fractures. METHODS This prospective study enrolled 15 patients in whom mandibular angle fractures were treated with 1.7 mm 3D plate using trans-buccal trochar. Patients were evaluated at 72 h, 2 weeks, 6 weeks and 12 weeks for fracture stability, occlusion, soft-tissue swelling, infection and post-operative inferior alveolar nerve damage. Other complications like wound dehiscence, non-union, mal-union and hardware failure were also assessed. RESULTS In the immediate post-operative period, fracture instability was seen in 1 (6.7%) patient which resolved by 2 weeks. Mild occlusal discrepancy was also noted in 1 (6.7%) patient. Wound dehiscence was seen in 5 (33.3%) patients and all resolved by local measures. 1 (6.7%) patient developed post-operative nerve paraesthesia. Immediate post-operative radiographic evaluation demonstrated optimal reduction in all cases with no inferior border gaping. No case of infection, hardware failure, non-union and mal-union was noted. CONCLUSION Within the limitations of the study, 1.7 mm 3D strut plate was found to be effective for management of non-communited mandibular angle fractures.
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Affiliation(s)
- Varnika Pandey
- Ex-Resident, Department of Oral and Maxillofacial Surgery, All India Institute of Medical Sciences, New Delhi, India
| | - Ongkila Bhutia
- Professor, Department of Oral and Maxillofacial Surgery, All India Institute of Medical Sciences, New Delhi, India
| | - Shakil Ahmed Nagori
- Ex-Resident, Department of Oral and Maxillofacial Surgery, All India Institute of Medical Sciences, New Delhi, India
| | - Ashu Seith
- Professor, Department of Radiology, All India Institute of Medical Sciences, New Delhi, India
| | - Ajoy Roychoudhury
- Professor and Head, Department of Oral and Maxillofacial Surgery, All India Institute of Medical Sciences, New Delhi, India
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Dickhoff C, Li WW, Symersky P, Hartemink KJ. Feasibility of 3-dimensional video-assisted thoracic surgery (3D-VATS) for pulmonary resection. Ann Surg Innov Res 2015; 9:8. [PMID: 26478741 PMCID: PMC4608051 DOI: 10.1186/s13022-015-0018-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [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: 10/15/2014] [Accepted: 10/08/2015] [Indexed: 11/10/2022]
Abstract
Background Two-dimensional video-assisted thoracic surgery (2D-VATS) has gained its position in daily practise. Although very useful, its two-dimensional view has its drawbacks when performing pulmonary resections. We report our first experience with 3-dimensional video-assisted surgery (3D-VATS). Advantages and differences with 2D-VATS and robotic surgery (RS) are discussed. Methods To evaluate feasibility, we scheduled patients for surgery by 3D-VATS who would normally be treated with 2D-VATS. The main difference of the equipment in 3D-VATS compared with former VATS equipment, is the flexible camera-tip (100-degrees) and the necessary 3D-glasses. Results Four patients were successfully operated for anatomic pulmonary resections. On-the-structure dissection was easily performed and with the flexible camera-tip, a perfect view can be obtained, with clear visualisation of important (hilar) structures. These features highly facilitate the surgeon in tissue preparation and recognition of the dissection planes. Conclusion In our opinion, 3D-VATS is superior to 2D-VATS for performing anatomic pulmonary resection and we expect an improvement in terms of operation time and learning curve. Furthermore, it is a valuable alternative for RS at lower costs.
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Affiliation(s)
- Chris Dickhoff
- Department of Cardio-Thoracic Surgery, VU University Medical Center, P.O. Box 7057, 1007 MB Amsterdam, The Netherlands ; Department of Surgery, VU University Medical Center, P.O. Box 7057, 1007 MB Amsterdam, The Netherlands
| | - Wilson W Li
- Department of Surgery, Netherlands Cancer Institute - Antoni van Leeuwenhoek Hospital, P.O. Box 90203, 1006 BE Amsterdam, The Netherlands
| | - Petr Symersky
- Department of Cardio-Thoracic Surgery, VU University Medical Center, P.O. Box 7057, 1007 MB Amsterdam, The Netherlands
| | - Koen J Hartemink
- Department of Surgery, Netherlands Cancer Institute - Antoni van Leeuwenhoek Hospital, P.O. Box 90203, 1006 BE Amsterdam, The Netherlands
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Abstract
BACKGROUND Four-dimensional (4D) ultrasound scanning (3D real-time mode) can improve the orientation of the anatomy of the area of interest and navigation by controlling the needle position. The objectives of this study were to identify the optimal technique for navigation and to assess clinically the efficacy of 4D ultrasound navigation for epidural anaesthesia at lower thoracic and lumbar levels. DESIGN Single-centre case series study was performed. METHODS Sixteen patients were included. First, conventional 2D scanning was performed, followed by 4D reconstruction, and the basic tissues with high acoustic impedance (bone structures) and available acoustic windows were determined. Movement of the needle was controlled on the sagittal plane in 2D mode and at the same time in 4D mode (3D real-time mode). To improve the visibility of the needle, the 3D reconstruction was rotated during manipulation. RESULTS The 4D scanning mode provided 100 % visibility of compact bone tissues and 93 % visibility of the posterior complex. Needle visualisation strongly depended on the rotation of the reconstructed image with the sensor remaining motionless. The needle was redirected in one patient (7 %) because it was in contact with the vertebral lamina. Dilation of the epidural space during saline injection was observed in five patients (36 %). A change in the puncture level was not required any patients; no complications associated with epidural puncture were observed. CONCLUSIONS Ultrasound navigation in 4D could improve epidural anaesthesia due to the enhanced spatial orientation of the operator. The technique of "position contrast" should be used for reliable needle visualisation.
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Affiliation(s)
- Alexey G. Voloshin
- Pain Management Centre, Medical Center “Petrovskie vorota”, 1-st Kolobovsky Lane, 4, 127051 Moscow, Russian Federation
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24
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Kersbergen KJ, de Vries LS, van Kooij BJM, Išgum I, Rademaker KJ, van Bel F, Hüppi PS, Dubois J, Groenendaal F, Benders MJNL. Hydrocortisone treatment for bronchopulmonary dysplasia and brain volumes in preterm infants. J Pediatr 2013; 163:666-71.e1. [PMID: 23706359 DOI: 10.1016/j.jpeds.2013.04.001] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2012] [Revised: 03/11/2013] [Accepted: 04/04/2013] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To assess whether there was an adverse effect on brain growth after hydrocortisone (HC) treatment for bronchopulmonary dysplasia (BPD) in a large cohort of infants without dexamethasone exposure. STUDY DESIGN Infants who received HC for BPD between 2005 and 2011 and underwent magnetic resonance imaging at term-equivalent age were included. Control infants born in Geneva (2005-2006) and Utrecht (2007-2011) were matched to the infants treated with HC according to segmentation method, sex, and gestational age. Infants with overt parenchymal pathology were excluded. Multivariable analysis was used to determine if there was a difference in brain volumes between the 2 groups. RESULTS Seventy-three infants treated with HC and 73 matched controls were included. Mean gestational age was 26.7 weeks, and mean birth weight was 906 g. After correction for gestational age, postmenstrual age at time of scanning, the presence of intraventricular hemorrhage, and birth weight z-score, no differences were found between infants treated with HC and controls in total brain tissue or cerebellar volumes. CONCLUSIONS In the absence of associated parenchymal brain injury, no reduction in brain tissue or cerebellar volumes could be found at term-equivalent age between infants with or without treatment with HC for BPD.
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Affiliation(s)
- Karina J Kersbergen
- Department of Neonatology, Wilhelmina Children's Hospital, University Medical Center Utrecht, Utrecht, The Netherlands
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Kiss DL, Windus LCE, Avery VM. Chemokine receptor expression on integrin-mediated stellate projections of prostate cancer cells in 3D culture. Cytokine 2013; 64:122-30. [PMID: 23921147 DOI: 10.1016/j.cyto.2013.07.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [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: 03/19/2013] [Revised: 07/05/2013] [Accepted: 07/10/2013] [Indexed: 01/18/2023]
Abstract
The chemokine receptor CXCR7 has emerged as a regulator of prostate tumor growth and invasion, along with the well-established role of its closely related receptor, CXCR4, and their shared ligand, SDF-1α. Consequently, inhibition of the CXCR7/CXCR4/SDF-1α axis may assist in controlling prostate tumor growth and progression. To facilitate the development of potential therapeutics, further clarification of CXCR7 function is required, specifically in relation to CXCR4. In this study, we report that CXCR7 and CXCR4 were co-expressed in LNCaP, DU145 and PC3 cell lines in 2D culture. When cultured in 3D using Matrigel, a marked up-regulation of both receptors was observed in PC3 cells. Interestingly, both CXCR7 and CXCR4 co-localized within radiating cellular structures, termed stellate projections, which protruded outward into the matrix. The stellate projections were rich in the expression of pro-invasive integrin β1, β-laminin and MMP-11 proteins. The development of the stellate projections was mediated by integrin β1-mediated interactions with the ECM, which also regulated the expression of CXCR7 and CXCR4. Taken together, these results demonstrate that integrin-mediated cell-ECM interactions can modulate tumor cell morphology, and regulate the expression of chemokine receptors which are associated with the invasive phenotype and progression of PCa.
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Affiliation(s)
- Debra L Kiss
- Discovery Biology, Eskitis Institute for Drug Discovery, Griffith University, Nathan, Queensland 4111, Australia.
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Ahmadi F, Zafarani F, Haghighi H, Niknejadi M, Vosough Taqi Dizaj A. Application of 3D Ultrasonography in Detection of Uterine Abnormalities. Int J Fertil Steril 2011; 4:144-7. [PMID: 24851173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/04/2010] [Accepted: 01/16/2011] [Indexed: 11/26/2022]
Abstract
Structural pathologies in the uterine cavity such as müllerian duct anomalies (MDAs) and intrauterine lesions (fibroids, polyps, synechiae) may have important roles in subinfertility, implantation failure and pregnancy outcome. Various imaging modalities such as hysterosalpingography (HSG), sonography, laparoscopy and hysteroscopy are used in the evaluation of MDAs and intrauterine lesions. Recently, three-dimensional ultrasound (3DUS) has been introduced as a non-invasive, outpatient diagnostic modality. With increased spatial awareness, it is superior to other techniques used for the same purpose.
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