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Kondziołka J, Michalecki Ł, Hajek J, Lebiedowska A, Hartman-Petrycka M, Koprowski R, Wilczyński S. Hemoglobin Concentration as an Indicator of Skin Radiation Damage During Radiation Therapy Treatments. Int J Radiat Oncol Biol Phys 2024:S0360-3016(24)00690-4. [PMID: 38838992 DOI: 10.1016/j.ijrobp.2024.05.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 05/01/2024] [Accepted: 05/27/2024] [Indexed: 06/07/2024]
Abstract
PURPOSE Acute radiation dermatitis (ARD) is the most common side effect reported by patients undergoing radiation therapy (RT). Currently, the assessment of the severity of the reaction is based on the visual assessment of the skin, which is a subjective method, depending on many factors. The main aim of this study was to investigate the usefulness of hyperspectral imaging (HSI) in the assessment of ARD and find physiological factors that could be correlated with ARD. METHODS AND MATERIALS In this clinical pilot trial, weekly acquisitions of hyperspectral camera images of irradiated skin were performed for 5 weeks of RT and at the posttreatment follow-up visit which took place 30 to 40 days after the last fraction of RT. At the same time, the severity of radiodermatitis was assessed based on the criteria of the National Cancer Institute Common Terminology Criteria for Adverse Events (CTCAE). The content and concentration of chromophores in irradiated skin were quantitatively determined using a hyperspectral camera. RESULTS The use of HSI supported by image analysis and processing methods allowed for the determination of the content and distribution of hemoglobin and melanin in the irradiated skin. It was found that the hemoglobin concentration is correlated with the subjective assessment made according to the CTCAE protocol. CONCLUSIONS HSI is a sensitive and specific method of analyzing the concentration of chromophores in the skin, including hemoglobin. A clear correlation was found between hemoglobin concentration and CTCAE v.5 scale because of which HSI can be considered as an objective method of skin assessment during RT.
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Affiliation(s)
- Joanna Kondziołka
- Department of Basic Biomedical Science, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia, Katowice, Poland.
| | - Łukasz Michalecki
- The Radiotherapy Department, University Clinical Center of the Medical University of Silesia, Katowice, Poland
| | - Joanna Hajek
- The Radiotherapy Department, University Clinical Center of the Medical University of Silesia, Katowice, Poland
| | - Agata Lebiedowska
- Department of Basic Biomedical Science, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia, Katowice, Poland
| | - Magdalena Hartman-Petrycka
- Department of Basic Biomedical Science, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia, Katowice, Poland.
| | - Robert Koprowski
- Faculty of Science and Technology, Institute of Biomedical Engineering, University of Silesia in Katowice, Sosnowiec, Poland
| | - Sławomir Wilczyński
- Department of Basic Biomedical Science, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia, Katowice, Poland
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Gustafsson N, Bunke J, Magnusson L, Albinsson J, Hérnandez-Palacios J, Sheikh R, Malmsjö M, Merdasa A. Optimizing clinical O 2 saturation mapping using hyperspectral imaging and diffuse reflectance spectroscopy in the context of epinephrine injection. BIOMEDICAL OPTICS EXPRESS 2024; 15:1995-2013. [PMID: 38495727 PMCID: PMC10942706 DOI: 10.1364/boe.506492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 10/27/2023] [Accepted: 11/19/2023] [Indexed: 03/19/2024]
Abstract
Clinical determination of oxygen saturation (sO2) in patients is commonly performed via non-invasive optical techniques. However, reliance on a few wavelengths and some form of pre-determined calibration introduces limits to how these methods can be used. One example involves the assessment of sO2 after injection of local anesthetic using epinephrine, where some controversy exists around the time it takes for the epinephrine to have an effect. This is likely caused by a change in the tissue environment not accounted for by standard calibrated instruments and conventional analysis techniques. The present study aims to account for this changing environment by acquiring absorption spectra using hyperspectral imaging (HSI) and diffuse reflectance spectroscopy (DRS) before, during, and after the injection of local anesthesia containing epinephrine in human volunteers. We demonstrate the need to account for multiple absorbing species when applying linear spectral unmixing in order to obtain more clinically relevant sO2 values. In particular, we demonstrate how the inclusion of water absorption greatly affects the rate at which sO2 seemingly drops, which in turn sheds light on the current debate regarding the time required for local anesthesia with epinephrine to have an effect. In general, this work provides important insight into how spectral analysis methods need to be adapted to specific clinical scenarios to more accurately assess sO2.
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Affiliation(s)
- Nils Gustafsson
- Lund University, Skåne University Hospital, Department of Clinical Sciences Lund, Ophthalmology, Lund, Sweden
- NanoLund and Solid State Physics, Lund University, SE-221 00, Lund, Sweden
| | - Josefine Bunke
- Lund University, Skåne University Hospital, Department of Clinical Sciences Lund, Ophthalmology, Lund, Sweden
| | - Ludvig Magnusson
- Lund University, Skåne University Hospital, Department of Clinical Sciences Lund, Ophthalmology, Lund, Sweden
| | - John Albinsson
- Lund University, Skåne University Hospital, Department of Clinical Sciences Lund, Ophthalmology, Lund, Sweden
| | - Julio Hérnandez-Palacios
- Lund University, Skåne University Hospital, Department of Clinical Sciences Lund, Ophthalmology, Lund, Sweden
| | - Rafi Sheikh
- Lund University, Skåne University Hospital, Department of Clinical Sciences Lund, Ophthalmology, Lund, Sweden
| | - Malin Malmsjö
- Lund University, Skåne University Hospital, Department of Clinical Sciences Lund, Ophthalmology, Lund, Sweden
| | - Aboma Merdasa
- Lund University, Skåne University Hospital, Department of Clinical Sciences Lund, Ophthalmology, Lund, Sweden
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Merdasa A, Berggren J, Tenland K, Stridh M, Hernandez-Palacios J, Gustafsson N, Sheikh R, Malmsjö M. Oxygen saturation mapping during reconstructive surgery of human forehead flaps with hyperspectral imaging and spectral unmixing. Microvasc Res 2023; 150:104573. [PMID: 37390964 DOI: 10.1016/j.mvr.2023.104573] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 06/20/2023] [Accepted: 06/26/2023] [Indexed: 07/02/2023]
Abstract
BACKGROUND Optical spectroscopy is commonly used clinically to monitor oxygen saturation in tissue. The most commonly employed technique is pulse oximetry, which provides a point measurement of the arterial oxygen saturation and is commonly used for monitoring systemic hemodynamics, e.g. during anesthesia. Hyperspectral imaging (HSI) is an emerging technology that enables spatially resolved mapping of oxygen saturation in tissue (sO2), but needs to be further developed before implemented in clinical practice. The aim of this study is to demonstrate the applicability of HSI for mapping the sO2 in reconstructive surgery and demonstrate how spectral analysis can be used to obtain clinically relevant sO2 values. METHODS Spatial scanning HSI was performed on cutaneous forehead flaps, raised as part of a direct brow lift, in eight patients. Pixel-by-pixel spectral analysis, accounting for the absorption from multiple chromophores, was performed and compared to previous analysis techniques to assess sO2. RESULTS Spectral unmixing using a broad spectral range, and accounting for the absorption of melanin, fat, collagen, and water, provided a more clinically relevant estimate of sO2 than conventional techniques, where typically only spectral features associated with absorption of oxygenated (HbO2) and deoxygenated (HbR) hemoglobin are considered. We demonstrate its clinical applicability by generating sO2 maps of partially excised forehead flaps showed a gradual decrease in sO2 along the length of the flap from 95 % at the flap base to 85 % at the flap tip. After being fully excised, sO2 in the entire flap decreased to 50 % within a few minutes. CONCLUSIONS The results demonstrate the capability of sO2 mapping in reconstructive surgery in patients using HSI. Spectral unmixing, accounting for multiple chromophores, provides sO2 values that are in accordance with physiological expectations in patients with normal functioning microvascularization. Our results suggest that HSI methods that yield reliable spectra are to be preferred, so that the analysis can produce results that are of clinical relevance.
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Affiliation(s)
- Aboma Merdasa
- Department of Ophthalmology, Clinical Sciences Lund, Lund University, Sweden.
| | - Johanna Berggren
- Department of Ophthalmology, Clinical Sciences Lund, Lund University, Sweden; Skåne University Hospital, Department of Clinical Sciences Lund, Ophthalmology Lund, Sweden
| | - Kajsa Tenland
- Department of Ophthalmology, Clinical Sciences Lund, Lund University, Sweden; Skåne University Hospital, Department of Clinical Sciences Lund, Ophthalmology Lund, Sweden
| | - Magne Stridh
- Department of Ophthalmology, Clinical Sciences Lund, Lund University, Sweden; Skåne University Hospital, Department of Clinical Sciences Lund, Ophthalmology Lund, Sweden
| | | | - Nils Gustafsson
- Skåne University Hospital, Department of Clinical Sciences Lund, Ophthalmology Lund, Sweden
| | - Rafi Sheikh
- Department of Ophthalmology, Clinical Sciences Lund, Lund University, Sweden; Skåne University Hospital, Department of Clinical Sciences Lund, Ophthalmology Lund, Sweden
| | - Malin Malmsjö
- Department of Ophthalmology, Clinical Sciences Lund, Lund University, Sweden; Skåne University Hospital, Department of Clinical Sciences Lund, Ophthalmology Lund, Sweden
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Bunke J, Merdasa A, Stridh M, Rosenquist P, Berggren J, Hernandez-Palacios JE, Dahlstrand U, Reistad N, Sheikh R, Malmsjö M. Hyperspectral and Laser Speckle Contrast Imaging for Monitoring the Effect of Epinephrine in Local Anesthetics in Oculoplastic Surgery. Ophthalmic Plast Reconstr Surg 2022; 38:462-468. [PMID: 35470293 PMCID: PMC9462134 DOI: 10.1097/iop.0000000000002163] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/15/2022] [Indexed: 01/19/2023]
Abstract
PURPOSE Epinephrine is used in local anesthetics to induce vasoconstriction and thus reduce bleeding and prolong the anesthetic effect. Finding the optimal delay between the administration of the anesthetic and skin incision to ensure vasoconstriction and minimize bleeding is important and has recently become the subject of debate. This is the first study to assess blood perfusion and oxygen saturation (sO 2 ) simultaneously in response to a local anesthetic containing epinephrine in human oculoplastic surgery. METHODS A local anesthetic consisting of lidocaine and epinephrine (20 mg/ml + 12.5 μg/ml) was injected in the eyelids of 9 subjects undergoing blepharoplasty. The perfusion and sO 2 of the eyelids were monitored using laser speckle contrast imaging and hyperspectral imaging, respectively. RESULTS Laser speckle contrast imaging monitoring showed a decrease in perfusion over time centrally at the site of injection. Half-maximum effect was reached after 34 seconds, and full effect after 115 seconds, determined by exponential fitting. The drop in perfusion decreased gradually further away from the injection site and hypoperfusion was less prominent 4 mm from the injection site, with a spatially dependent half-maximum effect of 231 seconds. Hyperspectral imaging showed only a slight decrease in sO 2 of 11 % at the injection site. CONCLUSIONS The optimal time delay for skin incision in oculoplastic surgery is approximately 2 minutes after the injection of lidocaine with epinephrine. Longer delay does not lead to a further decrease in perfusion. As sO 2 was only slightly reduced after injection, the results indicate that the use of epinephrine is safe in the periocular region.
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Affiliation(s)
- Josefine Bunke
- Department of Clinical Sciences Lund, Ophthalmology, Lund University and Skåne University Hospital, Lund, Sweden
| | - Aboma Merdasa
- Department of Clinical Sciences Lund, Ophthalmology, Lund University and Skåne University Hospital, Lund, Sweden
- Department of Physics, Lund University, Lund, Sweden
| | - Magne Stridh
- Department of Clinical Sciences Lund, Ophthalmology, Lund University and Skåne University Hospital, Lund, Sweden
| | - Pernilla Rosenquist
- Department of Clinical Sciences Lund, Ophthalmology, Lund University and Skåne University Hospital, Lund, Sweden
| | - Johanna Berggren
- Department of Clinical Sciences Lund, Ophthalmology, Lund University and Skåne University Hospital, Lund, Sweden
| | | | - Ulf Dahlstrand
- Department of Clinical Sciences Lund, Ophthalmology, Lund University and Skåne University Hospital, Lund, Sweden
| | - Nina Reistad
- Department of Physics, Lund University, Lund, Sweden
| | - Rafi Sheikh
- Department of Clinical Sciences Lund, Ophthalmology, Lund University and Skåne University Hospital, Lund, Sweden
| | - Malin Malmsjö
- Department of Clinical Sciences Lund, Ophthalmology, Lund University and Skåne University Hospital, Lund, Sweden
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Robledo EA, Murillo J, Martin RV, Leiva K, Beiner C, Rodrigues MA, Fagundes M, Panoff J, Chuong M, Wu W, Godavarty A. Assessment of Tissue Oxygenation and Radiation Dermatitis Pre-, During, and Post-Radiation Therapy in Breast Cancer Patients. Front Oncol 2022; 12:879032. [PMID: 35880160 PMCID: PMC9307894 DOI: 10.3389/fonc.2022.879032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 03/24/2022] [Indexed: 11/13/2022] Open
Abstract
Over 95% of breast cancer patients treated with radiation therapy (RT) undergo an adverse skin reaction known as radiation dermatitis (RD). Assessment of severity or grading of RD is clinically visual and hence subjective. Our objective is to determine sub-clinical tissue oxygenation (oxygen saturation) changes in response to RT in breast cancer patients using near-infrared spectroscopic imaging and correlate these changes to RD grading. A 4-8 week longitudinal pilot imaging study was carried out on 10 RT-treated breast cancer patients. Non-contact near-infrared spectroscopic (NIRS) imaging was performed on the irradiated ipsilateral and the contralateral breast/chest wall, axilla and lower neck regions before RT, across the weeks of RT, and during follow-up after RT ended. Significant changes (p < 0.05) in oxygen saturation (StO2) of irradiated and contralateral breast/chest wall and axilla regions were observed across weeks of RT. The overall drop in StO2 was negatively correlated to RD scaling (in 7 out of 9 cases) and was higher in the irradiated regions when compared to its contralateral region. Differences in the pre-RT StO2 between ipsilateral and contralateral chest wall is a potential predictor of the severity of RD. The subclinical recovery of StO2 to its original state was longer than the visual recovery in RD grading scale, as observed from the post-RT assessment of tissue oxygenation.
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Affiliation(s)
- Edwin A. Robledo
- Optical Imaging Laboratory, Department of Biomedical Engineering, Florida International University, Miami, FL, United States
| | - Juan Murillo
- Optical Imaging Laboratory, Department of Biomedical Engineering, Florida International University, Miami, FL, United States
| | - Raquel Veiga Martin
- Optical Imaging Laboratory, Department of Biomedical Engineering, Florida International University, Miami, FL, United States
| | - Kevin Leiva
- Optical Imaging Laboratory, Department of Biomedical Engineering, Florida International University, Miami, FL, United States
| | - Corina Beiner
- Department of Radiation Oncology, Miami Cancer Institute, Baptist Health South Florida, Miami, FL, United States
| | - Maria Amelia Rodrigues
- Department of Radiation Oncology, Miami Cancer Institute, Baptist Health South Florida, Miami, FL, United States
| | - Marcio Fagundes
- Department of Radiation Oncology, Miami Cancer Institute, Baptist Health South Florida, Miami, FL, United States
| | - Joseph Panoff
- Department of Radiation Oncology, Miami Cancer Institute, Baptist Health South Florida, Miami, FL, United States
| | - Michael Chuong
- Department of Radiation Oncology, Miami Cancer Institute, Baptist Health South Florida, Miami, FL, United States
| | - Wensong Wu
- Department of Mathematics and Statistics, Florida International University, Miami, FL, United States
| | - Anuradha Godavarty
- Optical Imaging Laboratory, Department of Biomedical Engineering, Florida International University, Miami, FL, United States
- *Correspondence: Anuradha Godavarty,
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Aloupogianni E, Ishikawa M, Kobayashi N, Obi T. Hyperspectral and multispectral image processing for gross-level tumor detection in skin lesions: a systematic review. JOURNAL OF BIOMEDICAL OPTICS 2022; 27:JBO-220029VR. [PMID: 35676751 PMCID: PMC9174598 DOI: 10.1117/1.jbo.27.6.060901] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Accepted: 05/23/2022] [Indexed: 05/11/2023]
Abstract
SIGNIFICANCE Skin cancer is one of the most prevalent cancers worldwide. In the advent of medical digitization and telepathology, hyper/multispectral imaging (HMSI) allows for noninvasive, nonionizing tissue evaluation at a macroscopic level. AIM We aim to summarize proposed frameworks and recent trends in HMSI-based classification and segmentation of gross-level skin tissue. APPROACH A systematic review was performed, targeting HMSI-based systems for the classification and segmentation of skin lesions during gross pathology, including melanoma, pigmented lesions, and bruises. The review adhered to the 2020 Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) guidelines. For eligible reports published from 2010 to 2020, trends in HMSI acquisition, preprocessing, and analysis were identified. RESULTS HMSI-based frameworks for skin tissue classification and segmentation vary greatly. Most reports implemented simple image processing or machine learning, due to small training datasets. Methodologies were evaluated on heavily curated datasets, with the majority targeting melanoma detection. The choice of preprocessing scheme influenced the performance of the system. Some form of dimension reduction is commonly applied to avoid redundancies that are inherent in HMSI systems. CONCLUSIONS To use HMSI for tumor margin detection in practice, the focus of system evaluation should shift toward the explainability and robustness of the decision-making process.
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Affiliation(s)
- Eleni Aloupogianni
- Tokyo Institute of Technology, Department of Information and Communication Engineering, Tokyo, Japan
- Address all correspondence to Eleni Aloupogianni,
| | - Masahiro Ishikawa
- Saitama Medical University, Faculty of Health and Medical Care, Saitama, Japan
| | - Naoki Kobayashi
- Saitama Medical University, Faculty of Health and Medical Care, Saitama, Japan
| | - Takashi Obi
- Tokyo Institute of Technology, Department of Information and Communication Engineering, Tokyo, Japan
- Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Japan
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Wagner T, Radunz S, Becker F, Chalopin C, Kohler H, Gockel I, Jansen-Winkeln B. Hyperspectral imaging detects perfusion and oxygenation differences between stapled and hand-sewn intestinal anastomoses. Innov Surg Sci 2022; 7:59-63. [PMID: 36317013 PMCID: PMC9574651 DOI: 10.1515/iss-2022-0007] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Accepted: 05/25/2022] [Indexed: 08/16/2023] Open
Abstract
OBJECTIVES Hand-sewn and stapled intestinal anastomoses are both daily performed routine procedures by surgeons. Yet, differences in micro perfusion of these two surgical techniques and their impact on surgical outcomes are still insufficiently understood. Only recently, hyperspectral imaging (HSI) has been established as a non-invasive, contact-free, real-time assessment tool for tissue oxygenation and micro-perfusion. Hence, objective of this study was HSI assessment of different intestinal anastomotic techniques and analysis of patients' clinical outcome. METHODS Forty-six consecutive patients with an ileal-ileal anastomoses were included in our study; 21 side-to-side stapled and 25 end-to-end hand-sewn. Based on adsorption and reflectance of the analyzed tissue, chemical color imaging indicates oxygen saturation (StO2), tissue perfusion (near-infrared perfusion index [NIR]), organ hemoglobin index (OHI), and tissue water index (TWI). RESULTS StO2 as well as NIR of the region of interest (ROI) was significantly higher in stapled anastomoses as compared to hand-sewn ileal-ileal anastomoses (StO2 0.79 (0.74-0.81) vs. 0.66 (0.62-0.70); p<0.001 NIR 0.83 (0.70-0.86) vs. 0.70 (0.63-0.76); p=0.01). In both groups, neither anastomotic leakage nor abdominal septic complications nor patient death did occur. CONCLUSIONS Intraoperative HSI assessment is able to detect significant differences in tissue oxygenation and NIR of hand-sewn and stapled intestinal anastomoses. Long-term clinical consequences resulting from the reduced tissue oxygenation and tissue perfusion in hand-sewn anastomoses need to be evaluated in larger clinical trials, as patients may benefit from further refined surgical techniques.
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Affiliation(s)
- Tristan Wagner
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, University Hospital of Leipzig, Leipzig, Germany
- Department of General, Visceral and Transplant Surgery, University Hospital of Münster, Münster, Germany
| | - Sonia Radunz
- Department of General, Visceral and Transplant Surgery, University Hospital of Münster, Münster, Germany
| | - Felix Becker
- Department of General, Visceral and Transplant Surgery, University Hospital of Münster, Münster, Germany
| | - Claire Chalopin
- Innovation Center Computer Assisted Surgery, University of Leipzig, Leipzig, Germany
| | - Hannes Kohler
- Innovation Center Computer Assisted Surgery, University of Leipzig, Leipzig, Germany
| | - Ines Gockel
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Boris Jansen-Winkeln
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, University Hospital of Leipzig, Leipzig, Germany
- Department of General, Visceral and Vascular-Surgery, St. George’s Hospital of Leipzig, Leipzig, Germany
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Kondziołka J, Wilczyński S, Michalecki Ł. Potential Use of Novel Image and Signal Processing Methods to Develop a Quantitative Assessment of the Severity of Acute Radiation Dermatitis in Breast Cancer Radiotherapy. Clin Cosmet Investig Dermatol 2022; 15:725-733. [PMID: 35497689 PMCID: PMC9041143 DOI: 10.2147/ccid.s354320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 03/18/2022] [Indexed: 11/23/2022]
Abstract
More than 95% of patients who undergo radiotherapy report symptoms of radiation dermatitis, which is a side effect of this therapy. Erythema, edema, dry and moist desquamation intensify with each fraction of irradiation and can significantly reduce a patient's quality of life. Therefore, an effective skin care procedure is needed for skin that has been exposed to ionizing radiation in order to avoid unplanned treatment interruptions. The methods that are currently used to assess the severity of an acute radiation reaction are based on visual scales (RTOG, EORTC, NCI CTCAE, LENT-SOMA). Because the assessment is made subjectively, the results depend on the researchers, their experience and perceptiveness. Until now, several studies have been carried out to check the possibility of using an objective methods like hyperspectral imaging, thermal imaging, laser Doppler flowmetry, dielectric and electrochemical methods, reflection spectrophotometry and Courage-Khazaka Multi-skin instrument to radiation-induced dermatitis assessment. Unfortunately, due to various limitations that occurred in the research, none of these techniques was successfully implement as alternative for visual assessment. The continuous development of technology enables researchers to access new techniques that might constitute useful diagnostic and cognitive tools. Infrared thermal imaging, hyperspectral imaging and reflectance spectroscopy are examples of the visual techniques that have been used for many years in various fields of medicine, including dermatology and chronic wound or burn care. They provide information on the skin parameters, such as the temperature, concentration and distribution of chromophores (eg, hemoglobin and melanin), saturation or perfusion changes. The aim of this study is to review the available literature on the use of imaging methods in the clinical assessment of skin with lesions of various origins, evaluation of their suitability for the assessment of radiation reaction and consideration the possibility of creating a quantitative scale for assessing severity of acute radiation dermatitis.
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Affiliation(s)
- Joanna Kondziołka
- Department of Basic Biomedical Science, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia, Katowice, Poland
| | - Sławomir Wilczyński
- Department of Basic Biomedical Science, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia, Katowice, Poland
| | - Łukasz Michalecki
- University Clinical Center of the Medical University of Silesia, Katowice, Poland
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J Waterhouse D, Stoyanov D. Optimized spectral filter design enables more accurate estimation of oxygen saturation in spectral imaging. BIOMEDICAL OPTICS EXPRESS 2022; 13:2156-2173. [PMID: 35519287 PMCID: PMC9045927 DOI: 10.1364/boe.446975] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 01/18/2022] [Accepted: 01/23/2022] [Indexed: 06/14/2023]
Abstract
Oxygen saturation (SO2) in tissue is a crucially important physiological parameter with ubiquitous clinical utility in diagnosis, treatment, and monitoring, as well as widespread use as an invaluable preclinical research tool. Multispectral imaging can be used to visualize SO2 non-invasively, non-destructively and without contact in real-time using narrow spectral filter sets, but typically, these spectral filter sets are poorly suited to a specific clinical task, application, or tissue type. In this work, we demonstrate the merit of optimizing spectral filter sets for more accurate estimation of SO2. Using tissue modelling and simulated multispectral imaging, we demonstrate filter optimization reduces the root-mean-square-error (RMSE) in estimating SO2 by up to 37% compared with evenly spaced filters. Moreover, we demonstrate up to a 79% decrease in RMSE for optimized filter sets compared with filter sets chosen to minimize mutual information. Wider adoption of this approach will result in more effective multispectral imaging systems that can address specific clinical needs and consequently, more widespread adoption of multispectral imaging technologies in disease diagnosis and treatment.
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Affiliation(s)
- Dale J Waterhouse
- Wellcome/EPSRC Centre for Interventional and Surgical Sciences, Department of Medical Physics and Biomedical Engineering, University College London, UK
| | - Danail Stoyanov
- Wellcome/EPSRC Centre for Interventional and Surgical Sciences, Department of Medical Physics and Biomedical Engineering, University College London, UK
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10
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Müller-Seubert W, Ostermaier P, Horch RE, Distel L, Frey B, Cai A, Arkudas A. Intra- and Early Postoperative Evaluation of Malperfused Areas in an Irradiated Random Pattern Skin Flap Model Using Indocyanine Green Angiography and Near-Infrared Reflectance-Based Imaging and Infrared Thermography. J Pers Med 2022; 12:jpm12020237. [PMID: 35207725 PMCID: PMC8880010 DOI: 10.3390/jpm12020237] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 01/18/2022] [Accepted: 01/27/2022] [Indexed: 02/06/2023] Open
Abstract
Background: Assessment of tissue perfusion after irradiation of random pattern flaps still remains a challenge. Methods: Twenty-five rats received harvesting of bilateral random pattern fasciocutaneous flaps. Group 1 served as nonirradiated control group. The right flaps of the groups 2–5 were irradiated with 20 Gy postoperatively (group 2), 3 × 12 Gy postoperatively (group 3), 20 Gy preoperatively (group 4) and 3 × 12 Gy preoperatively (group 5). Imaging with infrared thermography, indocyanine green angiography and near-infrared reflectance-based imaging were performed to detect necrotic areas of the flaps. Results: Analysis of the percentage of the necrotic area of the irradiated flaps showed a statistically significant increase from day 1 to 14 only in group 5 (p < 0.05). Indocyanine green angiography showed no differences (p > 0.05) of the percentage of the nonperfused area between all days in group 1 and 3, but a decrease in group 2 in both the left and the right flaps. Infrared thermography and near-infrared reflectance-based imaging did not show evaluable differences. Conclusion: Indocyanine green angiography is more precise in prediction of necrotic areas in random pattern skin flaps when compared to hyperspectral imaging, thermography or clinical impression. Preoperative fractional irradiation with a lower individual dose but a higher total dose has a more negative impact on flap perfusion compared to higher single stage irradiation.
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Affiliation(s)
- Wibke Müller-Seubert
- Laboratory for Tissue Engineering and Regenerative Medicine, Department of Plastic and Hand Surgery, University Hospital Erlangen, Friedrich Alexander University Erlangen-Nuremberg FAU, 91054 Erlangen, Germany; (P.O.); (R.E.H.); (A.C.); (A.A.)
- Correspondence: ; Tel.: +49-9131-85-33296; Fax: +49-9131-85-39327
| | - Patrick Ostermaier
- Laboratory for Tissue Engineering and Regenerative Medicine, Department of Plastic and Hand Surgery, University Hospital Erlangen, Friedrich Alexander University Erlangen-Nuremberg FAU, 91054 Erlangen, Germany; (P.O.); (R.E.H.); (A.C.); (A.A.)
| | - Raymund E. Horch
- Laboratory for Tissue Engineering and Regenerative Medicine, Department of Plastic and Hand Surgery, University Hospital Erlangen, Friedrich Alexander University Erlangen-Nuremberg FAU, 91054 Erlangen, Germany; (P.O.); (R.E.H.); (A.C.); (A.A.)
| | - Luitpold Distel
- Department of Radiation Oncology, University Hospital Erlangen, Friedrich Alexander University Erlangen-Nuremberg FAU, 91054 Erlangen, Germany;
| | - Benjamin Frey
- Translational Radiobiology, Department of Radiation Oncology, University Hospital Erlangen, Friedrich Alexander University Erlangen-Nuremberg FAU, 91054 Erlangen, Germany;
| | - Aijia Cai
- Laboratory for Tissue Engineering and Regenerative Medicine, Department of Plastic and Hand Surgery, University Hospital Erlangen, Friedrich Alexander University Erlangen-Nuremberg FAU, 91054 Erlangen, Germany; (P.O.); (R.E.H.); (A.C.); (A.A.)
| | - Andreas Arkudas
- Laboratory for Tissue Engineering and Regenerative Medicine, Department of Plastic and Hand Surgery, University Hospital Erlangen, Friedrich Alexander University Erlangen-Nuremberg FAU, 91054 Erlangen, Germany; (P.O.); (R.E.H.); (A.C.); (A.A.)
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11
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El-Sharkawy YH, Aref MH, Elbasuney S, Radwan SM, El-Sayyad GS. Oxygen saturation measurements using novel diffused reflectance with hyperspectral imaging: Towards facile COVID-19 diagnosis. OPTICAL AND QUANTUM ELECTRONICS 2022; 54:322. [PMID: 35571992 PMCID: PMC9080549 DOI: 10.1007/s11082-022-03658-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 03/02/2022] [Indexed: 05/13/2023]
Abstract
Oxygen saturation level plays a vital role in screening, diagnosis, and therapeutic assessment of disease's assortment. There is an urgent need to design and implement early detection devices and applications for the COVID-19 pandemic; this study reports on the development of customized, highly sensitive, non-invasive, non-contact diffused reflectance system coupled with hyperspectral imaging for mapping subcutaneous blood circulation depending on its oxygen saturation level. The forearm of 15 healthy adult male volunteers with age range of (20-38 years) were illuminated via a polychromatic light source of a spectrum range 400-980 nm. Each patient had been scanned five times to calculate the mean spectroscopic reflectance images using hyperspectral camera. The customized signal processing algorithm includes normalization and moving average filter for noise removal. Afterward, employing K-means clustering for image segmentation to assess the accuracy of blood oxygen saturation (SpO2) levels. The reliability of the developed diffused reflectance system was verified with the ground truth technique, a standard pulse oximeter. Non-invasive, non-contact diffused reflectance spectrum demonstrated maximum signal variation at 610 nm according to SpO2 level. Statistical analysis (mean, standard deviation) of diffused reflectance hyperspectral images at 610 nm offered precise calibrated measurements to the standard pulse oximeter. Diffused reflectance associated with hyperspectral imaging is a prospective technique to assist with phlebotomy and vascular approach. Additionally, it could permit future surgical or pharmacological intercessions that titrate or limit ischemic injury continuously. Furthermore, this technique could offer a fast reliable indication of SpO2 levels for COVID-19 diagnosis.
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Affiliation(s)
- Yasser H. El-Sharkawy
- Head of Biomedical Engineering Department, Military Technical College, Egyptian Armed Forces, Cairo, Egypt
| | - Mohamed Hisham Aref
- Biomedical Engineering Department, Military Technical College, Egyptian Armed Forces, Cairo, Egypt
| | - Sherif Elbasuney
- Head of Nanotechnology Research Center, Military Technical College, Egyptian Armed Forces, Cairo, Egypt
| | - Sara M. Radwan
- Biochemistry Department, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt
| | - Gharieb S. El-Sayyad
- Microbiology and Immunology Department, Faculty of Pharmacy, Galala University, New Galala city, Suez, Egypt
- Chemical Engineering Department, Military Technical College, Egyptian Armed Forces, Cairo, Egypt
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12
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Abdlaty R, Fang Q. Skin erythema assessment techniques. Clin Dermatol 2021; 39:591-604. [PMID: 34809765 DOI: 10.1016/j.clindermatol.2021.03.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Skin erythema may present owing to many causes. One of the common causes is prolonged exposure to sunrays. Other than sun exposure, skin erythema is an accompanying sign of dermatologic diseases, such as psoriasis and acne. Quantifying skin erythema in patients enables the dermatologist to assess the patient's skin health. Quantitative assessment of skin erythema has been the focus of several studies. The clinical standard for erythema evaluation is visual assessment; however, this standard has some deficiencies. For instance, visual assessment is subjective and ineffectual for precise color information exchange. To overcome these limitations, in the past three decades various methodologies have been developed in an attempt to achieve objective erythema assessments, such as diffuse reflectance spectroscopy and both optical and nonoptical systems. This review considers the studies published during the past three decades and discusses the performance, the mathematical tactics for computation, and the limited capabilities of erythema assessment techniques for cutaneous diseases. The achievements and limitations of the current techniques in erythema assessment are presented. The advantages and development trends of optical and nonoptical methods are presented to make the reader aware of the present technological advances and their potential for dermatological disease research.
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Affiliation(s)
- Ramy Abdlaty
- Biomedical Engineering, Military Technical College, Kobry-Elkobba, Cairo, Egypt
| | - Qiyin Fang
- Department of Engineering Physics, McMaster University, Hamilton, ONT, Canada.
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13
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van Manen L, Birkhoff WAJ, Eggermont J, Hoveling RJM, Nicklin P, Burggraaf J, Wilson R, Mieog JSD, Robinson DJ, Vahrmeijer AL, Bradbury MS, Dijkstra J. Detection of cutaneous oxygen saturation using a novel snapshot hyperspectral camera: a feasibility study. Quant Imaging Med Surg 2021; 11:3966-3977. [PMID: 34476182 DOI: 10.21037/qims-21-46] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 04/15/2021] [Indexed: 11/06/2022]
Abstract
Background Tissue necrosis, a consequence of inadequate tissue oxygenation, is a common post-operative complication. As current surgical assessments are often limited to visual and tactile feedback, additional techniques that can aid in the interrogation of tissue viability are needed to improve patient outcomes. In this bi-institutional pilot study, the performance of a novel snapshot hyperspectral imaging camera to detect superficial cutaneous oxygen saturation (StO2) was evaluated. Methods Healthy human volunteers were recruited at two participating centers. Cutaneous StO2 of the forearm was determined by a snapshot hyperspectral camera on two separate study days during occlusion-reperfusion of the brachial artery and after induction of local vasodilation. To calculate the blood StO2 at each pixel in the multispectral image, spectra were selected, and fitting was performed over wavelengths ranging from 470 to 950 nm. Results Quantitative detection of physiological changes in cutaneous StO2 levels was feasible in all sixteen volunteers. A significant (P<0.001) decrease in cutaneous StO2 levels from 78.3% (SD: 15.3) at baseline to 60.6% (SD: 19.8) at the end of occlusion phase was observed, although StO2 levels returned to baseline after five minutes. Mean cutaneous StO2 values were similar in the same subjects on separate study days (Pearson R2: 0.92 and 0.77, respectively) at both centers. Local vasodilation did not yield significant changes in cutaneous StO2 values. Conclusions This pilot study demonstrated the feasibility of a snapshot hyperspectral camera for detecting quantitative physiological changes in cutaneous StO2 in normal human volunteers, and serves as a precursor for further validation in perioperative studies.
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Affiliation(s)
- Labrinus van Manen
- Department of Surgery, Leiden University Medical Center, Leiden, The Netherlands
| | | | - Jeroen Eggermont
- Leiden University Medical Center, Division of Image Processing, Department of Radiology, Leiden, The Netherlands
| | | | - Philip Nicklin
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Jacobus Burggraaf
- Department of Surgery, Leiden University Medical Center, Leiden, The Netherlands.,Centre for Human Drug Research, Leiden, The Netherlands
| | - Roger Wilson
- Department of Anesthesiology, Critical Care Medicine, and Surgery, Memorial Sloan Kettering Cancer Center Research, New York, NY, USA
| | - J Sven D Mieog
- Department of Surgery, Leiden University Medical Center, Leiden, The Netherlands
| | - Dominic J Robinson
- Erasmus Medical Center, Center for Optical Diagnostics and Therapy, Department of Otorhinolaryngology and Head and Neck Surgery, Rotterdam, The Netherlands
| | | | - Michelle S Bradbury
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, USA.,MSK-Cornell Center for Translation of Cancer Nanomedicines, Memorial Sloan Kettering Cancer Center, New York, NY, USA.,Molecular Pharmacology Program, Sloan Kettering Institute for Cancer Research, New York, NY, USA
| | - Jouke Dijkstra
- Leiden University Medical Center, Division of Image Processing, Department of Radiology, Leiden, The Netherlands
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14
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Calin MA, Macovei A, Savastru R, Nica AS, Parasca SV. New evidence from hyperspectral imaging analysis on the effect of photobiomodulation therapy on normal skin oxygenation. Lasers Med Sci 2021; 37:1539-1547. [PMID: 34436694 DOI: 10.1007/s10103-021-03397-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 08/06/2021] [Indexed: 11/24/2022]
Abstract
The aim of this study was to assess the changes induced by photobiomodulation therapy in oxygenation of normal skin and underlying tissue using hyperspectral imaging combined with a chemometric regression approach. Eleven healthy adult volunteers were enrolled in this study. The dorsal side of the left hand of each subject was exposed to photobiomodulation therapy, while the correspondent side of the right hand was used as a control (placebo effect). Laser irradiation was performed with a laser diode system (635 nm, 15mW, 9 J/cm2) for 900 s. Changes in skin oxygenation were assessed before and after applying the photobiomodulation therapy and placebo using the hyperspectral imaging. Hyperspectral data analysis showed that variations of oxyhemoglobin and deoxyhemoglobin concentrations had no statistical significance in both groups. In conclusion, photobiomodulation therapy does not induce changes in oxyhemoglobin and deoxyhemoglobin concentrations in the normal skin measured from hyperspectral images, at least at λ = 635 nm and 900-s exposure time.
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Affiliation(s)
- Mihaela Antonina Calin
- National Institute of Research and Development for Optoelectronics INOE 2000, 409 Atomistilor Street, P.O. Box MG5, 077125, Magurele, Ilfov, Romania.
| | - Adrian Macovei
- Gen. Dr. Aviator Victor Anastasiu National Institute of Aeronautical and Space Medicine, 88 Mircea Vulcanescu Street, Bucharest, Romania
| | - Roxana Savastru
- National Institute of Research and Development for Optoelectronics INOE 2000, 409 Atomistilor Street, P.O. Box MG5, 077125, Magurele, Ilfov, Romania
| | - Adriana Sarah Nica
- Physical Medicine and Balneoclimatology, National Institute of Rehabilitation, Clinique III, 11th Ion Mihalache Street, Bucharest, Romania.,Carol Davila University of Medicine and Pharmacy, 37 Dionisie Lupu Street, Bucharest, Romania
| | - Sorin Viorel Parasca
- Carol Davila University of Medicine and Pharmacy, 37 Dionisie Lupu Street, Bucharest, Romania.,Emergency Clinical Hospital for Plastic, Reconstructive Surgery and Burns, 218 Grivitei Street, Bucharest, Romania
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15
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Abdlaty R, Hayward J, Farrell T, Fang Q. Skin erythema and pigmentation: a review of optical assessment techniques. Photodiagnosis Photodyn Ther 2020; 33:102127. [PMID: 33276114 DOI: 10.1016/j.pdpdt.2020.102127] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 10/28/2020] [Accepted: 11/23/2020] [Indexed: 10/22/2022]
Abstract
BACKGROUND Skin erythema may present due to many causes. One of the common causes is prolonged exposure to sun rays. Other than sun exposure, skin erythema is an accompanying sign of dermatological diseases such as acne, psoriasis, melasma, post inflammatory hyperpigmentation, fever, as well as exposure to specific electromagnetic wave bands. METHODS Quantifying skin erythema in patients enables the dermatologist to assess the patient's skin health. Therefore, quantitative assessment of skin erythema was the target of several studies. The clinical standard for erythema evaluation is visual assessment. However, the former standard has some imperfections. For instance, it is subjective, and unqualified for precise color information exchange. To overcome these shortcomings, the past three decades witnessed various methodologies that aimed to achieve erythema objective assessment, such as diffuse reflectance spectroscopy (DRS), and both optical and non-optical systems. DISCUSSION This review article reports on the studies published in the past three decades where the performance, the mathematical tactics for computation, and the capabilities of erythema assessment techniques for cutaneous diseases are discussed. In particular, the achievements and limitations of the current techniques in erythema assessment are presented. CONCLUSION The profits and development trends of optical and non-optical methods are displayed to provide the researcher with awareness into the present technological advances and its potential for dermatological diseases research.
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Affiliation(s)
| | - Joseph Hayward
- Juravinski Cancer Centre, Hamilton Health Sciences, Ontario, Canada
| | - Thomas Farrell
- Department of Medical Physics and Applied Radiation Sciences, McMaster University, Ontario, Canada
| | - Qiyin Fang
- Engineering Physics, McMaster University, Ontario, Canada
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16
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Lee J, Jang WH, Shim S, Kim B, Jang WS, Myung JK, Park S, Kim KH. Characterization of early-stage cutaneous radiation injury by using optical coherence tomography angiography. BIOMEDICAL OPTICS EXPRESS 2020; 11:2652-2664. [PMID: 32499950 PMCID: PMC7249837 DOI: 10.1364/boe.387400] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 03/12/2020] [Accepted: 04/13/2020] [Indexed: 05/09/2023]
Abstract
Cutaneous radiation injury (CRI) is a skin injury caused by exposure to high dose ionizing radiation (IR). Diagnosis and treatment of CRI is difficult due to its initial clinically latent period and the following inflammatory bursts. Early detection of CRI before clinical symptoms will be helpful for effective treatment, and various optical methods have been applied with limitations. Here we show that optical coherence tomography angiography (OCTA) could detect changes in the skin during the latent period in CRI mouse models non-invasively. CRI was induced on the mouse hindlimb with exposure to various IR doses and the injured skin regions were imaged longitudinally by OCTA until the onset of clinical symptoms. OCTA detected several changes in the skin including the skin thickening, the dilation of large blood vessels, and the irregularity in vessel boundaries. Some of OCTA findings were confirmed by histology. The study results showed that OCTA could be used for early CRI detection.
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Affiliation(s)
- Jungbin Lee
- Department of Mechanical Engineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-gu, Pohang, Gyeongbuk 37673, South Korea
| | - Won Hyuk Jang
- Divison of Integrative Biosciences & Biotechnology, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-gu, Pohang, Gyeongbuk 37673, South Korea
| | - Sehwan Shim
- National Radiation Emergency Medical Centre, Korea Cancer Centre Hospital, Korea Institute of Radiological & Medical Sciences (KIRAMS), 75 Nowon-ro, Nowon-gu, Seoul 01812, South Korea
| | - Bumju Kim
- Divison of Integrative Biosciences & Biotechnology, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-gu, Pohang, Gyeongbuk 37673, South Korea
| | - Won-Suk Jang
- Laboratory of Experimental Pathology, Korea Cancer Centre Hospital, Korea Institute of Radiological & Medical Sciences (KIRAMS), 75 Nowon-ro, Nowon-gu, Seoul 01812, South Korea
| | - Jae Kyung Myung
- National Radiation Emergency Medical Centre, Korea Cancer Centre Hospital, Korea Institute of Radiological & Medical Sciences (KIRAMS), 75 Nowon-ro, Nowon-gu, Seoul 01812, South Korea
- Laboratory of Experimental Pathology, Korea Cancer Centre Hospital, Korea Institute of Radiological & Medical Sciences (KIRAMS), 75 Nowon-ro, Nowon-gu, Seoul 01812, South Korea
- Department of Pathology, Korea Cancer Centre Hospital, Korea Institute of Radiological & Medical Sciences (KIRAMS), 75 Nowon-ro, Nowon-gu, Seoul 01812, South Korea
| | - Sunhoo Park
- National Radiation Emergency Medical Centre, Korea Cancer Centre Hospital, Korea Institute of Radiological & Medical Sciences (KIRAMS), 75 Nowon-ro, Nowon-gu, Seoul 01812, South Korea
- Laboratory of Experimental Pathology, Korea Cancer Centre Hospital, Korea Institute of Radiological & Medical Sciences (KIRAMS), 75 Nowon-ro, Nowon-gu, Seoul 01812, South Korea
- Department of Pathology, Korea Cancer Centre Hospital, Korea Institute of Radiological & Medical Sciences (KIRAMS), 75 Nowon-ro, Nowon-gu, Seoul 01812, South Korea
| | - Ki Hean Kim
- Department of Mechanical Engineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-gu, Pohang, Gyeongbuk 37673, South Korea
- Divison of Integrative Biosciences & Biotechnology, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-gu, Pohang, Gyeongbuk 37673, South Korea
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17
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FitzGerald TJ, Bishop-Jodoin M, Laurie F, Lukez A, O’Loughlin L, Sacher A. Treatment Toxicity. Hematol Oncol Clin North Am 2019; 33:1027-1039. [DOI: 10.1016/j.hoc.2019.08.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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18
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Grambow E, Dau M, Sandkühler NA, Leuchter M, Holmer A, Klar E, Weinrich M. Evaluation of peripheral artery disease with the TIVITA® Tissue hyperspectral imaging camera system. Clin Hemorheol Microcirc 2019; 73:3-17. [DOI: 10.3233/ch-199215] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Eberhard Grambow
- Department for General, Visceral, Vascular and Transplantation Surgery, University Medical Center Rostock, Rostock, Germany
| | - Michael Dau
- Department of Oral, Maxillofacial and Plastic Surgery, University Medical Center Rostock, Rostock, Germany
| | - Niels Arne Sandkühler
- Department for General, Visceral, Vascular and Transplantation Surgery, University Medical Center Rostock, Rostock, Germany
| | - Matthias Leuchter
- Department for General, Visceral, Vascular and Transplantation Surgery, University Medical Center Rostock, Rostock, Germany
| | | | - Ernst Klar
- Department for General, Visceral, Vascular and Transplantation Surgery, University Medical Center Rostock, Rostock, Germany
| | - Malte Weinrich
- Department for General, Visceral, Vascular and Transplantation Surgery, University Medical Center Rostock, Rostock, Germany
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19
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FitzGerald TJ, Bishop‐Jodoin M, Laurie F, Riberdy C, Aronowitz JN, Bannon E, Bornstein BA, Bradford CD, Bushe H, Cicchetti MG, Ding L, Glanzman JM, Goff DJ, Herrick BB, Hiatt JR, Kuo I, Lo Y, Moni J, Pieters RS, Rava PS, Sacher A, Saleeby J, Sioshansi S, Ulin K, Varlotto JM, Wang T. RADIATION THERAPY. Cancer 2019. [DOI: 10.1002/9781119645214.ch24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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20
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Abstract
INTRODUCTION Anastomotic insufficiency (AI) remains the most feared surgical complication in gastrointestinal surgery, which is closely associated with a prolonged inpatient hospital stay and significant postoperative mortality. Hyperspectral imaging (HSI) is a relatively new medical imaging procedure which has proven to be promising in tissue identification as well as in the analysis of tissue oxygenation and water content. Until now, no data exist on the in vivo HSI analysis of gastrointestinal anastomoses. METHODS Intraoperative images were obtained using the TIVITA™ tissue system HSI camera from Diaspective Vision GmbH (Pepelow, Germany). In 47 patients who underwent gastrointestinal surgery with esophageal, gastric, pancreatic, small bowel or colorectal anastomoses, 97 assessable recordings were generated. Parameters obtained at the sites of the anastomoses included tissue oxygenation (StO2), the tissue hemoglobin index (THI), near-infrared (NIR) perfusion index, and tissue water index (TWI). RESULTS Obtaining and analyzing the intraoperative images with this non-invasive imaging system proved practicable and delivered good results on a consistent basis. A NIR gradient along and across the anastomosis was observed and, furthermore, analysis of the tissue water and oxygenation content showed specific changes at the site of anastomosis. CONCLUSION The HSI method provides a non-contact, non-invasive, intraoperative imaging procedure without the use of a contrast medium, which enables a real-time analysis of physiological anastomotic parameters, which may contribute to determine the "ideal" anastomotic region. In light of this, the establishment of this methodology in the field of visceral surgery, enabling the generation of normal or cut off values for different gastrointestinal anastomotic types, is an obvious necessity.
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21
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Kulcke A, Holmer A, Wahl P, Siemers F, Wild T, Daeschlein G. A compact hyperspectral camera for measurement of perfusion parameters in medicine. ACTA ACUST UNITED AC 2019. [PMID: 29522415 DOI: 10.1515/bmt-2017-0145] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Worldwide, chronic wounds are still a major and increasing problem area in medicine with protracted suffering of patients and enormous costs. Beside conventional wound treatment, for instance kinds of oxygen therapy and cold plasma technology have been tested, providing an improvement in the perfusion of wounds and their healing potential, but these methods are unfortunately not sufficiently validated and accepted for clinical practice to date. Using hyperspectral imaging technology in the visible (VIS) and near infrared (NIR) region with high spectral and spatial resolution, perfusion parameters of tissue and wounds can be determined. We present a new compact hyperspectral camera which can be used in clinical practice. From hyperspectral data the hemoglobin oxygenation (StO2), the relative concentration of hemoglobin [tissue hemoglobin index (THI)] and the so-called NIR-perfusion index can be determined. The first two parameters are calculated from the VIS-part of the spectrum and represent the perfusion of superficial tissue layers, whereas the NIR-perfusion index is calculated from the NIR-part representing the perfusion in deeper layers. First clinical measurements of transplanted flaps and chronic ulcer wounds show, that the perfusion level can be determined quantitatively allowing sensitive evaluation and monitoring for an optimization of the wound treatment planning and for validation of new treatment methods.
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Affiliation(s)
- Axel Kulcke
- Diaspective Vision GmbH, Strandstraße 15, D-18233 Am Salzhaff, Germany
| | - Amadeus Holmer
- Diaspective Vision GmbH, Strandstrasse 13, D-18233 Am Salzhaff, Germany
| | - Philip Wahl
- Diaspective Vision GmbH, Strandstrasse 13, D-18233 Am Salzhaff, Germany
| | - Frank Siemers
- Department of Plastic and Hand Surgery and Burn Unit, BG Klinikum Bergmannstrost, Merseburger Strasse 165, 06002 Halle (Saale), Germany
| | - Thomas Wild
- Department of Plastic, Aesthetic and Hand Surgery, Interdisciplinary Center for Treatment of Chronic Wounds, Auenweg 38, 06847 Dessau, Germany.,Department of Dermatology, Venereology, Allergology and Immunology, Dessau Medical Center, Brandenburg Medical School Theodore Fontane, Auenweg 38, 06847 Dessau, Germany
| | - Georg Daeschlein
- Department of Dermatology, University Medicine Greifswald, Sauerbruchstr., 17475 Greifswald, Germany
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22
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Yoon J, Joseph J, Waterhouse DJ, Luthman AS, Gordon GSD, di Pietro M, Januszewicz W, Fitzgerald RC, Bohndiek SE. A clinically translatable hyperspectral endoscopy (HySE) system for imaging the gastrointestinal tract. Nat Commun 2019; 10:1902. [PMID: 31015458 PMCID: PMC6478902 DOI: 10.1038/s41467-019-09484-4] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 03/12/2019] [Indexed: 02/06/2023] Open
Abstract
Hyperspectral imaging (HSI) enables visualisation of morphological and biochemical information, which could improve disease diagnostic accuracy. Unfortunately, the wide range of image distortions that arise during flexible endoscopy in the clinic have made integration of HSI challenging. To address this challenge, we demonstrate a hyperspectral endoscope (HySE) that simultaneously records intrinsically co-registered hyperspectral and standard-of-care white light images, which allows image distortions to be compensated computationally and an accurate hyperspectral data cube to be reconstructed as the endoscope moves in the lumen. Evaluation of HySE performance shows excellent spatial, spectral and temporal resolution and high colour fidelity. Application of HySE enables: quantification of blood oxygenation levels in tissue mimicking phantoms; differentiation of spectral profiles from normal and pathological ex vivo human tissues; and recording of hyperspectral data under freehand motion within an intact ex vivo pig oesophagus model. HySE therefore shows potential for enabling HSI in clinical endoscopy.
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Affiliation(s)
- Jonghee Yoon
- Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK
- Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Cambridge, CB2 0RE, UK
| | - James Joseph
- Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK
- Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Cambridge, CB2 0RE, UK
| | - Dale J Waterhouse
- Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK
- Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Cambridge, CB2 0RE, UK
| | - A Siri Luthman
- Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK
- Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Cambridge, CB2 0RE, UK
| | - George S D Gordon
- Department of Engineering, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0FA, UK
| | - Massimiliano di Pietro
- MRC Cancer Unit, Hutchison/MRC Research Centre, University of Cambridge, Cambridge, CB2 0XZ, UK
| | - Wladyslaw Januszewicz
- MRC Cancer Unit, Hutchison/MRC Research Centre, University of Cambridge, Cambridge, CB2 0XZ, UK
| | - Rebecca C Fitzgerald
- MRC Cancer Unit, Hutchison/MRC Research Centre, University of Cambridge, Cambridge, CB2 0XZ, UK
| | - Sarah E Bohndiek
- Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK.
- Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Cambridge, CB2 0RE, UK.
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23
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Feng W, Shi R, Zhang C, Liu S, Yu T, Zhu D. Visualization of skin microvascular dysfunction of type 1 diabetic mice using in vivo skin optical clearing method. JOURNAL OF BIOMEDICAL OPTICS 2018. [PMID: 30120827 DOI: 10.1117/12.2288265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
To realize visualization of the skin microvascular dysfunction of type 1 diabetic mice, we combined laser speckle contrast imaging and hyperspectral imaging to simultaneously monitor the noradrenaline (NE)-induced responses of vascular blood flow and blood oxygen with the development of diabetes through optical clearing skin window. The main results showed that venous and arterious blood flow decreased without recovery after injection of NE; furthermore, the decrease of arterious blood oxygen induced by NE greatly weakened, especially for 2- and 4-week diabetic mice. This change in vasoconstricting effect of NE was related to the expression of α1-adrenergic receptor. This study demonstrated that skin microvascular function was a potential research biomarker for early warning in the occurrence and development of diabetes. The in vivo skin optical clearing method provides a feasible solution to realize visualization of cutaneous microvessels for monitoring microvascular reactivity under pathological conditions. In addition, visual monitoring of skin microvascular function response has guiding significance for early diagnosis of diabetes and clinical research.
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Affiliation(s)
- Wei Feng
- Huazhong University of Science and Technology, Wuhan National Laboratory for Optoelectronics, Britto, China
- Huazhong University of Science and Technology, School of Engineering Sciences, Collaborative Innovat, China
| | - Rui Shi
- Huazhong University of Science and Technology, Wuhan National Laboratory for Optoelectronics, Britto, China
- Huazhong University of Science and Technology, School of Engineering Sciences, Collaborative Innovat, China
| | - Chao Zhang
- Huazhong University of Science and Technology, Wuhan National Laboratory for Optoelectronics, Britto, China
- Huazhong University of Science and Technology, School of Engineering Sciences, Collaborative Innovat, China
| | - Shaojun Liu
- Huazhong University of Science and Technology, Wuhan National Laboratory for Optoelectronics, Britto, China
- Huazhong University of Science and Technology, School of Engineering Sciences, Collaborative Innovat, China
| | - Tingting Yu
- Huazhong University of Science and Technology, Wuhan National Laboratory for Optoelectronics, Britto, China
- Huazhong University of Science and Technology, School of Engineering Sciences, Collaborative Innovat, China
| | - Dan Zhu
- Huazhong University of Science and Technology, Wuhan National Laboratory for Optoelectronics, Britto, China
- Huazhong University of Science and Technology, School of Engineering Sciences, Collaborative Innovat, China
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Feng W, Shi R, Zhang C, Liu S, Yu T, Zhu D. Visualization of skin microvascular dysfunction of type 1 diabetic mice using in vivo skin optical clearing method. JOURNAL OF BIOMEDICAL OPTICS 2018; 24:1-9. [PMID: 30120827 PMCID: PMC6975238 DOI: 10.1117/1.jbo.24.3.031003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 07/10/2018] [Indexed: 05/20/2023]
Abstract
To realize visualization of the skin microvascular dysfunction of type 1 diabetic mice, we combined laser speckle contrast imaging and hyperspectral imaging to simultaneously monitor the noradrenaline (NE)-induced responses of vascular blood flow and blood oxygen with the development of diabetes through optical clearing skin window. The main results showed that venous and arterious blood flow decreased without recovery after injection of NE; furthermore, the decrease of arterious blood oxygen induced by NE greatly weakened, especially for 2- and 4-week diabetic mice. This change in vasoconstricting effect of NE was related to the expression of α1-adrenergic receptor. This study demonstrated that skin microvascular function was a potential research biomarker for early warning in the occurrence and development of diabetes. The in vivo skin optical clearing method provides a feasible solution to realize visualization of cutaneous microvessels for monitoring microvascular reactivity under pathological conditions. In addition, visual monitoring of skin microvascular function response has guiding significance for early diagnosis of diabetes and clinical research.
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Affiliation(s)
- Wei Feng
- Huazhong University of Science and Technology, Wuhan National Laboratory for Optoelectronics, Britton Chance Center for Biomedical Photonics, Wuhan, Hubei, China
- Huazhong University of Science and Technology, School of Engineering Sciences, Collaborative Innovation Center for Biomedical Engineering, MoE Key Laboratory for Biomedical Photonics, Wuhan, Hubei, China
| | - Rui Shi
- Huazhong University of Science and Technology, Wuhan National Laboratory for Optoelectronics, Britton Chance Center for Biomedical Photonics, Wuhan, Hubei, China
- Huazhong University of Science and Technology, School of Engineering Sciences, Collaborative Innovation Center for Biomedical Engineering, MoE Key Laboratory for Biomedical Photonics, Wuhan, Hubei, China
| | - Chao Zhang
- Huazhong University of Science and Technology, Wuhan National Laboratory for Optoelectronics, Britton Chance Center for Biomedical Photonics, Wuhan, Hubei, China
- Huazhong University of Science and Technology, School of Engineering Sciences, Collaborative Innovation Center for Biomedical Engineering, MoE Key Laboratory for Biomedical Photonics, Wuhan, Hubei, China
| | - Shaojun Liu
- Huazhong University of Science and Technology, Wuhan National Laboratory for Optoelectronics, Britton Chance Center for Biomedical Photonics, Wuhan, Hubei, China
- Huazhong University of Science and Technology, School of Engineering Sciences, Collaborative Innovation Center for Biomedical Engineering, MoE Key Laboratory for Biomedical Photonics, Wuhan, Hubei, China
| | - Tingting Yu
- Huazhong University of Science and Technology, Wuhan National Laboratory for Optoelectronics, Britton Chance Center for Biomedical Photonics, Wuhan, Hubei, China
- Huazhong University of Science and Technology, School of Engineering Sciences, Collaborative Innovation Center for Biomedical Engineering, MoE Key Laboratory for Biomedical Photonics, Wuhan, Hubei, China
| | - Dan Zhu
- Huazhong University of Science and Technology, Wuhan National Laboratory for Optoelectronics, Britton Chance Center for Biomedical Photonics, Wuhan, Hubei, China
- Huazhong University of Science and Technology, School of Engineering Sciences, Collaborative Innovation Center for Biomedical Engineering, MoE Key Laboratory for Biomedical Photonics, Wuhan, Hubei, China
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Holmer A, Marotz J, Wahl P, Dau M, Kämmerer PW. Hyperspectral imaging in perfusion and wound diagnostics – methods and algorithms for the determination of tissue parameters. ACTA ACUST UNITED AC 2018; 63:547-556. [DOI: 10.1515/bmt-2017-0155] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 06/01/2018] [Indexed: 02/05/2023]
Abstract
Abstract
Blood perfusion is the supply of tissue with blood, and oxygen is a key factor in the field of minor and major wound healing. Reduced perfusion of a wound bed or transplant often causes various complications. Reliable methods for an objective evaluation of perfusion status are still lacking, and insufficient perfusion may remain undiscovered, resulting in chronic processes and failing transplants. Hyperspectral imaging (HSI) represents a novel method with increasing importance for clinical practice. Therefore, methods, software and algorithms for a new HSI system are presented which can be used to observe tissue oxygenation and other parameters that are of importance in supervising healing processes. This could offer an improved insight into wound perfusion allowing timely intervention.
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Affiliation(s)
- Amadeus Holmer
- Diaspective Vision GmbH , Strandstraße 15 , D-18233 Am Salzhaff , Germany
| | - Jörg Marotz
- Diaspective Vision GmbH , Strandstraße 15 , D-18233 Am Salzhaff , Germany
| | - Philip Wahl
- Diaspective Vision GmbH , Strandstraße 15 , D-18233 Am Salzhaff , Germany
| | - Michael Dau
- Department of Oral, Maxillofacial Plastic Surgery , University Medical Center Rostock , D-18057 Rostock , Germany
| | - Peer W. Kämmerer
- Department of Oral, Maxillofacial Plastic Surgery , University Medical Center Rostock , D-18057 Rostock , Germany
- Department of Oral, Maxillofacial Plastic Surgery , University Medical Center Mainz , D-55131 Mainz , Germany
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Experimental Demonstration of Remote and Compact Imaging Spectrometer Based on Mobile Devices. SENSORS 2018; 18:s18071989. [PMID: 29933615 PMCID: PMC6068658 DOI: 10.3390/s18071989] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Revised: 06/03/2018] [Accepted: 06/20/2018] [Indexed: 12/30/2022]
Abstract
Imaging spectrometers show great potential for environmental and biomedical sensing applications. Selfie sticks, which are tools used to take photographs or videos, have gained global popularity in recent years. Few people have connected these two objects, and few people have researched the application of imaging spectrometers to perform scientific monitoring in point-of-use scenarios. In this paper, we develop a compact imaging spectrometer (35 g in weight, 18 mm in diameter, and 72 mm in length) that can be equipped on a motorized selfie stick to perform remote sensing. We applied this system to perform environmental and facial remote sensing via motorized scanning. The absorption of chlorophyll and hemoglobin can be found in the reflectance spectra, indicating that our system can be used in urban greening monitoring and point-of-care testing. In addition, this compact imaging spectrometer was also easily attached to an underwater dome port and a quad-rotor unmanned aerial vehicle to perform underwater and airborne spectral detection. Our system offers a route toward mobile imaging spectrometers used in daily life.
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Wild T, Becker M, Winter J, Schuhschenk N, Daeschlein G, Siemers F. Hyperspectral imaging of tissue perfusion and oxygenation in wounds: assessing the impact of a micro capillary dressing. J Wound Care 2018; 27:38-51. [DOI: 10.12968/jowc.2018.27.1.38] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Thomas Wild
- Clinic of Plastic, Aesthetic und Hand Surgery, Universtiy of Applied Science Anhalt, Medical Center Desau; Clinic of Dermatologie, Venerology und Allergology, Immunological Center, Medical School Brandenburg ‘Theodor Fontane’ Medical Center Dessau
| | - Markus Becker
- Clinic of Dermatologie, Venerology und Allergology, Immunological Center, Medical School Brandenburg ‘Theodor Fontane’ Medical Center Dessau
| | - Jochen Winter
- Clinic of Plastic, Aesthetic und Hand Surgery, Universtiy of Applied Science Anhalt, Medical Center Desau
| | - Nicole Schuhschenk
- Clinic of Plastic, Aesthetic und Hand Surgery, Universtiy of Applied Science Anhalt, Medical Center Desau
| | | | - Frank Siemers
- Berufsgenossenschaftliche Kliniken Bergmannstrost, Postfach 200153, D-06002 Halle (Saale)
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Grambow E, Dau M, Holmer A, Lipp V, Frerich B, Klar E, Vollmar B, Kämmerer PW. Hyperspectral imaging for monitoring of perfusion failure upon microvascular anastomosis in the rat hind limb. Microvasc Res 2017; 116:64-70. [PMID: 29107094 DOI: 10.1016/j.mvr.2017.10.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 10/03/2017] [Accepted: 10/25/2017] [Indexed: 11/18/2022]
Abstract
BACKGROUND/PURPOSE Objective, reliable and easy monitoring of microvascular tissue perfusion is a goal that was achieved for many years with limited success. Therefore, a new non-invasive hyperspectral camera system (TIVITA™) was tested for this purpose in an in vivo animal model. METHODS Evaluation of tissue oxygenation during ischemia and upon reperfusion was performed in left hind limb in a rat model (n=20). Ischemia was induced by clamping and dissection of the superficial femoral artery. Reperfusion of the limb was achieved by microsurgical anastomosis of the dissected artery. Oxygenation parameters of the hind limb were assessed via TIVITA™ before and immediately after clamping and dissection of the artery, 3 and 30min after reperfusion as well as on postoperative days 1 and 2. Thereby, the non-operated hind limb served as control. As clinical parameters, the refill of the anastomosis as well as the progress of the affected leg were assessed. RESULTS In 12 from 20 cases, TIVITA™ recorded a sufficient reperfusion with oxygenation parameters comparable to baseline or control condition. However, in 8 from 20 cases oxygenation was found impaired after reperfusion causing a re-assessment of the microvascular anastomosis. Thereby, technical problems like stenosis or local thrombosis were found in all cases and were surgically treated leading to an increased tissue oxygenation. CONCLUSIONS The TIVITA™ camera system is a valid non-invasive tool to assess tissue perfusion after microvascular anastomosis. As it safely shows problems in oxygenation, it allows the clinician a determined revision of the site in time in order to prevent prolonged ischemia.
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Affiliation(s)
- Eberhard Grambow
- Institute for Experimental Surgery, University Medical Center Rostock, Rostock, Germany; Department for General, Thoracic-, Vascular- and Transplantation Surgery, University Medical Center Rostock, Rostock, Germany.
| | - Michael Dau
- Department of Oral and Maxillofacial Surgery, Facial Plastic Surgery, University Medical Centre Rostock, Rostock, Germany
| | | | - Vicky Lipp
- Department of Oral and Maxillofacial Surgery, Facial Plastic Surgery, University Medical Centre Rostock, Rostock, Germany
| | - Bernhard Frerich
- Department of Oral and Maxillofacial Surgery, Facial Plastic Surgery, University Medical Centre Rostock, Rostock, Germany
| | - Ernst Klar
- Department for General, Thoracic-, Vascular- and Transplantation Surgery, University Medical Center Rostock, Rostock, Germany
| | - Brigitte Vollmar
- Institute for Experimental Surgery, University Medical Center Rostock, Rostock, Germany
| | - Peer Wolfgang Kämmerer
- Department of Oral and Maxillofacial Surgery, Facial Plastic Surgery, University Medical Centre Rostock, Rostock, Germany
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Sharma P, Sahu K, Kushwaha PK, Kumar S, Swami MK, Kumawat J, Patel HS, Kher S, Sahani PK, Haridas G, Gupta PK. Noninvasive assessment of cutaneous alterations in mice exposed to whole body gamma irradiation using optical imaging techniques. Lasers Med Sci 2017; 32:1535-1544. [PMID: 28699043 DOI: 10.1007/s10103-017-2276-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Accepted: 06/25/2017] [Indexed: 10/25/2022]
Abstract
We report the results of a study carried out to investigate the potential of optical techniques such as optical coherence tomography, Mueller matrix spectroscopy, and cross-polarization imaging for noninvasive monitoring of the ionizing radiation exposure-induced alterations in cutaneous tissue of mice. Radiation dose-dependent changes were observed in tissue microvasculature and tissue optical parameters like retardance and depolarization as early as 1 h post radiation exposure. Results suggest that these optical techniques may allow early detection of radiation dose-dependent alterations which could help in screening of population exposed to radiation.
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Affiliation(s)
- P Sharma
- Laser Biomedical Applications Section, Raja Ramanna Centre for Advanced Technology, Indore, India.,Homi Bhabha National Institute, Mumbai, India
| | - K Sahu
- Laser Biomedical Applications Section, Raja Ramanna Centre for Advanced Technology, Indore, India.
| | - P K Kushwaha
- Laser Biomedical Applications Section, Raja Ramanna Centre for Advanced Technology, Indore, India
| | - S Kumar
- Laser Biomedical Applications Section, Raja Ramanna Centre for Advanced Technology, Indore, India
| | - M K Swami
- Laser Biomedical Applications Section, Raja Ramanna Centre for Advanced Technology, Indore, India
| | - J Kumawat
- Laser Biomedical Applications Section, Raja Ramanna Centre for Advanced Technology, Indore, India
| | - H S Patel
- Laser Biomedical Applications Section, Raja Ramanna Centre for Advanced Technology, Indore, India
| | - S Kher
- Solid State Lasers Division, Raja Ramanna Centre for Advanced Technology, Indore, India
| | - P K Sahani
- Indus Operations, Beam Dynamics & Diagnostics Division, Raja Ramanna Centre for Advanced Technology, Indore, India
| | - G Haridas
- Indus Operations, Beam Dynamics & Diagnostics Division, Raja Ramanna Centre for Advanced Technology, Indore, India
| | - P K Gupta
- Homi Bhabha National Institute, Mumbai, India
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Hyperspectral Imaging Provides Early Prediction of Random Axial Flap Necrosis in a Preclinical Model. Plast Reconstr Surg 2017; 139:1285e-1290e. [DOI: 10.1097/prs.0000000000003352] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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31
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Chin MS, Siegel-Reamer L, FitzGerald GA, Wyman A, Connor NM, Lo YC, Sioshansi S, Moni J, Giulia Cicchetti M, Lalikos JF, FitzGerald TJ. Association between cumulative radiation dose, adverse skin reactions, and changes in surface hemoglobin among women undergoing breast conserving therapy. Clin Transl Radiat Oncol 2017; 4:15-23. [PMID: 29594203 PMCID: PMC5833900 DOI: 10.1016/j.ctro.2017.03.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 03/23/2017] [Accepted: 03/23/2017] [Indexed: 10/26/2022] Open
Abstract
Introduction Radiation therapy is crucial to effective cancer treatment. Modern treatment strategies have reduced possible skin injury, but few clinical studies have addressed the dose relationship between radiation exposure and skin reaction. This prospective clinical study analyzes skin oxygenation/perfusion in patients undergoing fractionated breast conserving therapy via hyperspectral imaging (HSI). Methods Forty-three women undergoing breast conserving therapy were enrolled in this study. Optically stimulated luminescent dosimeters (OSLDs) measured radiation exposure in four sites: treatment breast, lumpectomy scar, medial tattoo and the control breast. The oxygenation/perfusion states of these sites were prospectively imaged before and after each treatment fraction with HSI. Visual skin reactions were classified according to the RTOG system. Results 2753 observations were obtained and indicated a dose-response relationship between radiation exposure and oxygenated hemoglobin (OxyHb) after a 600 cGy cumulative dose threshold. There was a relatively weak association between DeoxyHb and radiation exposure. Results suggest strong correlations between changes in mean OxyHb and skin reaction as well as between radiation exposure and changes in skin reaction. Conclusion HSI demonstrates promise in the assessment of skin dose as well as an objective measure of skin reaction. The ability to easily identify adverse skin reactions and to modify the treatment plan may circumvent the need for detrimental treatment breaks.
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Affiliation(s)
- Michael S Chin
- Occupational and Environmental Medicine Program, Harvard T.H. Chan School of Public Health, USA
| | | | | | - Allison Wyman
- Department of Surgery, University of Massachusetts Medical School, USA
| | - Nikole M Connor
- Department of Radiation Oncology, University of Massachusetts Medical School, USA
| | - Yuan-Chyuan Lo
- Department of Radiation Oncology, University of Massachusetts Medical School, USA
| | - Shirin Sioshansi
- Department of Radiation Oncology, University of Massachusetts Medical School, USA
| | - Janaki Moni
- Department of Radiation Oncology, University of Massachusetts Medical School, USA
| | | | - Janice F Lalikos
- Department of Surgery, University of Massachusetts Medical School, USA
| | - Thomas J FitzGerald
- Department of Radiation Oncology, University of Massachusetts Medical School, USA
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Calin MA, Macovei A, Miclos S, Parasca SV, Savastru R, Hristea R. Simulated altitude exposure assessment by hyperspectral imaging. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:56012. [PMID: 28564692 DOI: 10.1117/1.jbo.22.5.056012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Accepted: 05/16/2017] [Indexed: 06/07/2023]
Abstract
Testing the human body’s reaction to hypoxia (including the one generated by high altitude) is important in aeronautic medicine. This paper presents a method of monitoring blood oxygenation during experimental hypoxia using hyperspectral imaging (HSI) and a spectral unmixing model based on a modified Beer–Lambert law. A total of 20 healthy volunteers (males) aged 25 to 60 years were included in this study. A line-scan HSI system was used to acquire images of the faces of the subjects. The method generated oxyhemoglobin and deoxyhemoglobin distribution maps from the foreheads of the subjects at 5 and 10 min of hypoxia and after recovery in a high oxygen breathing mixture. The method also generated oxygen saturation maps that were validated using pulse oximetry. An interesting pattern of desaturation on the forehead was discovered during the study, showing one of the advantages of using HSI for skin oxygenation monitoring in hypoxic conditions. This could bring new insight into the physiological response to high altitude and may become a step forward in air crew testing.
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Affiliation(s)
- Mihaela Antonina Calin
- National Institute of Research and Development for Optoelectronics-INOE 2000, Magurele, Romania
| | - Adrian Macovei
- National Institute of Aeronautical and Space Medicine, "Gen. Dr. Aviator Victor Anastasiu," Bucharest, Romania
| | - Sorin Miclos
- National Institute of Research and Development for Optoelectronics-INOE 2000, Magurele, Romania
| | - Sorin Viorel Parasca
- Emergency Clinical Hospital for Plastic, Reconstructive Surgery and Burns, Bucharest, RomaniadCarol Davila University of Medicine and Pharmacy, Department of Plastic and Reconstructive Surgery, Bucharest, Romania
| | - Roxana Savastru
- National Institute of Research and Development for Optoelectronics-INOE 2000, Magurele, Romania
| | - Razvan Hristea
- National Institute of Aeronautical and Space Medicine, "Gen. Dr. Aviator Victor Anastasiu," Bucharest, Romania
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Affiliation(s)
- Lewis. E. MacKenzie
- School of Biomedical Sciences, University of Leeds, Garstang Building Leeds, Leeds, UK
| | - Andy. R. Harvey
- School of Physics and Astronomy, Kelvin Building University of Glasgow University Avenue, Glasgow, UK
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Chin LCL, Cook EK, Yohan D, Kim A, Niu C, Wilson BC, Liu SK. Early biomarker for radiation-induced wounds: day one post-irradiation assessment using hemoglobin concentration measured from diffuse optical reflectance spectroscopy. BIOMEDICAL OPTICS EXPRESS 2017; 8:1682-1688. [PMID: 28663856 PMCID: PMC5480571 DOI: 10.1364/boe.8.001682] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 02/01/2017] [Accepted: 02/14/2017] [Indexed: 05/20/2023]
Abstract
Normal tissue radiation toxicities are evaluated subjectively and cannot predict the development of severe side-effects. Using a hand-held diffuse reflectance optical spectroscopy probe, we measured optical parameters in mouse skin 1-4 days after irradiation. Using a radiation toxicity model and a therapeutic mitigator described previously [BMC Cancer14, 614 (2014)], we found that hemoglobin (Hb) levels increased sharply 24 h after irradiation only in the irradiated group without the mitigator. This group also had the largest peak wound areas after 14 days. We conclude that increased Hb one day after skin irradiation predicts the severity of the subsequent irradiation-induced wound.
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Affiliation(s)
- Lee C. L. Chin
- Department of Physics, Ryerson University, Toronto, ON M5B 2K3, Canada
- Department of Medical Physics, Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, ON M4N 3M5, Canada
- Department of Radiation Oncology, University of Toronto, Toronto, ON M5T 1P5, Canada
| | - Elina K. Cook
- Department of Medical Biophysics, University of Toronto, Toronto, ON M5G 1L7, Canada
| | - Darren Yohan
- Department of Physics, Ryerson University, Toronto, ON M5B 2K3, Canada
| | - Anthony Kim
- Department of Medical Physics, Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, ON M4N 3M5, Canada
| | - Carolyn Niu
- Department of Medical Biophysics, University of Toronto, Toronto, ON M5G 1L7, Canada
- Ontario Cancer Institute / Campbell Family Institute for Cancer Research, Toronto, ON M5G 2M9, Canada
| | - Brian C. Wilson
- Department of Medical Biophysics, University of Toronto, Toronto, ON M5G 1L7, Canada
- Ontario Cancer Institute / Campbell Family Institute for Cancer Research, Toronto, ON M5G 2M9, Canada
| | - Stanley K. Liu
- Department of Radiation Oncology, University of Toronto, Toronto, ON M5T 1P5, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, ON M5G 1L7, Canada
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Muselimyan N, Swift LM, Asfour H, Chahbazian T, Mazhari R, Mercader MA, Sarvazyan NA. Seeing the Invisible: Revealing Atrial Ablation Lesions Using Hyperspectral Imaging Approach. PLoS One 2016; 11:e0167760. [PMID: 27930718 PMCID: PMC5145191 DOI: 10.1371/journal.pone.0167760] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2016] [Accepted: 11/18/2016] [Indexed: 01/11/2023] Open
Abstract
Background Currently, there are limited means for high-resolution monitoring of tissue injury during radiofrequency ablation procedures. Objective To develop the next generation of visualization catheters that can reveal irreversible atrial muscle damage caused by ablation and identify viability gaps between the lesions. Methods Radiofrequency lesions were placed on the endocardial surfaces of excised human and bovine atria and left ventricles of blood perfused rat hearts. Tissue was illuminated with 365nm light and a series of images were acquired from individual spectral bands within 420-720nm range. By extracting spectral profiles of individual pixels and spectral unmixing, the relative contribution of ablated and unablated spectra to each pixel was then displayed. Results of spectral unmixing were compared to lesion pathology. Results RF ablation caused significant changes in the tissue autofluorescence profile. The magnitude of these spectral changes in human left atrium was relatively small (< 10% of peak fluorescence value), yet highly significant. Spectral unmixing of hyperspectral datasets enabled high spatial resolution, in-situ delineation of radiofrequency lesion boundaries without the need for exogenous markers. Lesion dimensions derived from hyperspectral imaging approach strongly correlated with histological outcomes. Presence of blood within the myocardium decreased the amplitude of the autofluorescence spectra while having minimal effect on their overall shapes. As a result, the ability of hyperspectral imaging to delineate ablation lesions in vivo was not affected. Conclusions Hyperspectral imaging greatly increases the contrast between ablated and unablated tissue enabling visualization of viability gaps at clinically relevant locations. Data supports the possibility for developing percutaneous hyperspectral catheters for high-resolution ablation guidance.
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Affiliation(s)
- Narine Muselimyan
- Department of Pharmacology and Physiology, The George Washington University School of Medicine and Health Sciences, Washington, District of Columbia, United States of America
| | - Luther M. Swift
- Department of Pharmacology and Physiology, The George Washington University School of Medicine and Health Sciences, Washington, District of Columbia, United States of America
| | - Huda Asfour
- Department of Pharmacology and Physiology, The George Washington University School of Medicine and Health Sciences, Washington, District of Columbia, United States of America
| | | | - Ramesh Mazhari
- Division of Cardiology, The George Washington University, Medical Faculty Associates, Washington, District of Columbia, United States of America
| | - Marco A. Mercader
- Division of Cardiology, The George Washington University, Medical Faculty Associates, Washington, District of Columbia, United States of America
| | - Narine A. Sarvazyan
- Department of Pharmacology and Physiology, The George Washington University School of Medicine and Health Sciences, Washington, District of Columbia, United States of America
- * E-mail:
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Holmer A, Tetschke F, Marotz J, Malberg H, Markgraf W, Thiele C, Kulcke A. Oxygenation and perfusion monitoring with a hyperspectral camera system for chemical based tissue analysis of skin and organs. Physiol Meas 2016; 37:2064-2078. [DOI: 10.1088/0967-3334/37/11/2064] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Hyperspectral Imaging Using Intracellular Spies: Quantitative Real-Time Measurement of Intracellular Parameters In Vivo during Interaction of the Pathogenic Fungus Aspergillus fumigatus with Human Monocytes. PLoS One 2016; 11:e0163505. [PMID: 27727286 PMCID: PMC5058474 DOI: 10.1371/journal.pone.0163505] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 09/09/2016] [Indexed: 12/14/2022] Open
Abstract
Hyperspectral imaging (HSI) is a technique based on the combination of classical spectroscopy and conventional digital image processing. It is also well suited for the biological assays and quantitative real-time analysis since it provides spectral and spatial data of samples. The method grants detailed information about a sample by recording the entire spectrum in each pixel of the whole image. We applied HSI to quantify the constituent pH variation in a single infected apoptotic monocyte as a model system. Previously, we showed that the human-pathogenic fungus Aspergillus fumigatus conidia interfere with the acidification of phagolysosomes. Here, we extended this finding to monocytes and gained a more detailed analysis of this process. Our data indicate that melanised A. fumigatus conidia have the ability to interfere with apoptosis in human monocytes as they enable the apoptotic cell to recover from mitochondrial acidification and to continue with the cell cycle. We also showed that this ability of A. fumigatus is dependent on the presence of melanin, since a non-pigmented mutant did not stop the progression of apoptosis and consequently, the cell did not recover from the acidic pH. By conducting the current research based on the HSI, we could measure the intracellular pH in an apoptotic infected human monocyte and show the pattern of pH variation during 35 h of measurements. As a conclusion, we showed the importance of melanin for determining the fate of intracellular pH in a single apoptotic cell.
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Chin L, Korpela E, Kim A, Yohan D, Niu C, Wilson BC, Liu SK. Diffuse Optical Spectroscopy for the Quantitative Assessment of Acute Ionizing Radiation Induced Skin Toxicity Using a Mouse Model. J Vis Exp 2016. [PMID: 27284926 PMCID: PMC4927719 DOI: 10.3791/53573] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Acute skin toxicities from ionizing radiation (IR) are a common side effect from therapeutic courses of external beam radiation therapy (RT) and negatively impact patient quality of life and long term survival. Advances in the understanding of the biological pathways associated with normal tissue toxicities have allowed for the development of interventional drugs, however, current response studies are limited by a lack of quantitative metrics for assessing the severity of skin reactions. Here we present a diffuse optical spectroscopic (DOS) approach that provides quantitative optical biomarkers of skin response to radiation. We describe the instrumentation design of the DOS system as well as the inversion algorithm for extracting the optical parameters. Finally, to demonstrate clinical utility, we present representative data from a pre-clinical mouse model of radiation induced erythema and compare the results with a commonly employed visual scoring. The described DOS method offers an objective, high through-put evaluation of skin toxicity via functional response that is translatable to the clinical setting.
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Affiliation(s)
- Lee Chin
- Department of Radiation Oncology, University of Toronto; Department of Physics, Ryerson University;
| | - Elina Korpela
- Department of Medical Biophysics, University of Toronto
| | - Anthony Kim
- Department of Radiation Oncology, University of Toronto
| | | | - Carolyn Niu
- Ontario Cancer Institute / Campbell Family Institute for Cancer Research
| | | | - Stanley K Liu
- Department of Radiation Oncology, University of Toronto; Department of Medical Biophysics, University of Toronto
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Labrecque S, Sylvestre JP, Marcet S, Mangiarini F, Bourgoin B, Verhaegen M, Blais-Ouellette S, De Koninck P. Hyperspectral multiplex single-particle tracking of different receptor subtypes labeled with quantum dots in live neurons. JOURNAL OF BIOMEDICAL OPTICS 2016; 21:46008. [PMID: 27109870 DOI: 10.1117/1.jbo.21.4.046008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 03/15/2016] [Indexed: 05/24/2023]
Abstract
The efficacy of existing therapies and the discovery of innovative treatments for central nervous system (CNS) diseases have been limited by the lack of appropriate methods to investigate complex molecular processes at the synaptic level. To improve our capability to investigate complex mechanisms of synaptic signaling and remodeling, we designed a fluorescence hyperspectral imaging platform to simultaneously track different subtypes of individual neurotransmitter receptors trafficking in and out of synapses. This imaging platform allows simultaneous image acquisition of at least five fluorescent markers in living neurons with a high-spatial resolution. We used quantum dots emitting at different wavelengths and functionalized to specifically bind to single receptors on the membrane of living neurons. The hyperspectral imaging platform enabled the simultaneous optical tracking of five different synaptic proteins, including subtypes of glutamate receptors (mGluR and AMPAR) and postsynaptic signaling proteins. It also permitted the quantification of their mobility after treatments with various pharmacological agents. This technique provides an efficient method to monitor several synaptic proteins at the same time, which could accelerate the screening of effective compounds for treatment of CNS disorders.
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Affiliation(s)
- Simon Labrecque
- Institut Universitaire en santé mentale de Québec, 2601 Chemin de la Canardière, Québec G1J 2G3, Canada
| | | | - Stephane Marcet
- Photon Etc., 5795 de Gaspé ave., Montréal, Québec H2S 2X3, Canada
| | | | - Brice Bourgoin
- Photon Etc., 5795 de Gaspé ave., Montréal, Québec H2S 2X3, Canada
| | - Marc Verhaegen
- Photon Etc., 5795 de Gaspé ave., Montréal, Québec H2S 2X3, Canada
| | | | - Paul De Koninck
- Institut Universitaire en santé mentale de Québec, 2601 Chemin de la Canardière, Québec G1J 2G3, CanadacUniversité Laval, Department of Biochemistry, Microbiology, and Bio-informatics, Québec G1K 7P4, Canada
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Jang WH, Shim S, Wang T, Yoon Y, Jang WS, Myung JK, Park S, Kim KH. In vivo characterization of early-stage radiation skin injury in a mouse model by two-photon microscopy. Sci Rep 2016; 6:19216. [PMID: 26755422 PMCID: PMC4709756 DOI: 10.1038/srep19216] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 12/07/2015] [Indexed: 11/23/2022] Open
Abstract
Ionizing radiation (IR) injury is tissue damage caused by high energy electromagnetic waves such as X-ray and gamma ray. Diagnosis and treatment of IR injury are difficult due to its characteristics of clinically latent post-irradiation periods and the following successive and unpredictable inflammatory bursts. Skin is one of the many sensitive organs to IR and bears local injury upon exposure. Early-stage diagnosis of IR skin injury is essential in order to maximize treatment efficiency and to prevent the aggravation of IR injury. In this study, early-stage changes of the IR injured skin at the cellular level were characterized in an in vivo mouse model by two-photon microscopy (TPM). Various IR doses were applied to the mouse hind limbs and the injured skin regions were imaged daily for 6 days after IR irradiation. Changes in the morphology and distribution of the epidermal cells and damage of the sebaceous glands were observed before clinical symptoms. These results showed that TPM is sensitive to early-stage changes of IR skin injury and may be useful for its diagnosis.
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Affiliation(s)
- Won Hyuk Jang
- Divison of Integrative Biosciences &Biotechnology, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-gu, Pohang, Gyeongbuk 37673, Rep. of Korea
| | - Sehwan Shim
- National Radiation Emergency Medical Centre, Korea Cancer Centre Hospital, Korea Institute of Radiological &Medical Sciences (KIRAMS), 75 Nowon-ro, Nowon-gu, Seoul 01812, Rep. of Korea
| | - Taejun Wang
- Divison of Integrative Biosciences &Biotechnology, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-gu, Pohang, Gyeongbuk 37673, Rep. of Korea
| | - Yeoreum Yoon
- Department of Mechanical Engineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-gu, Pohang, Gyeongbuk 37673, Rep. of Korea
| | - Won-Suk Jang
- Laboratory of Experimental Pathology, Korea Cancer Centre Hospital, Korea Institute of Radiological &Medical Sciences (KIRAMS), 75 Nowon-ro, Nowon-gu, Seoul 01812, Rep. of Korea
| | - Jae Kyung Myung
- National Radiation Emergency Medical Centre, Korea Cancer Centre Hospital, Korea Institute of Radiological &Medical Sciences (KIRAMS), 75 Nowon-ro, Nowon-gu, Seoul 01812, Rep. of Korea.,Laboratory of Experimental Pathology, Korea Cancer Centre Hospital, Korea Institute of Radiological &Medical Sciences (KIRAMS), 75 Nowon-ro, Nowon-gu, Seoul 01812, Rep. of Korea.,Department of Pathology, Korea Cancer Centre Hospital, Korea Institute of Radiological &Medical Sciences (KIRAMS), 75 Nowon-ro, Nowon-gu, Seoul 01812, Rep. of Korea
| | - Sunhoo Park
- National Radiation Emergency Medical Centre, Korea Cancer Centre Hospital, Korea Institute of Radiological &Medical Sciences (KIRAMS), 75 Nowon-ro, Nowon-gu, Seoul 01812, Rep. of Korea.,Laboratory of Experimental Pathology, Korea Cancer Centre Hospital, Korea Institute of Radiological &Medical Sciences (KIRAMS), 75 Nowon-ro, Nowon-gu, Seoul 01812, Rep. of Korea.,Department of Pathology, Korea Cancer Centre Hospital, Korea Institute of Radiological &Medical Sciences (KIRAMS), 75 Nowon-ro, Nowon-gu, Seoul 01812, Rep. of Korea
| | - Ki Hean Kim
- Divison of Integrative Biosciences &Biotechnology, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-gu, Pohang, Gyeongbuk 37673, Rep. of Korea.,Department of Mechanical Engineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-gu, Pohang, Gyeongbuk 37673, Rep. of Korea
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Hyperspectral Imaging for Burn Depth Assessment in an Animal Model. PLASTIC AND RECONSTRUCTIVE SURGERY-GLOBAL OPEN 2016; 3:e591. [PMID: 26894016 PMCID: PMC4727700 DOI: 10.1097/gox.0000000000000558] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Accepted: 10/09/2015] [Indexed: 11/26/2022]
Abstract
UNLABELLED Differentiating between superficial and deep-dermal (DD) burns remains challenging. Superficial-dermal burns heal with conservative treatment; DD burns often require excision and skin grafting. Decision of surgical treatment is often delayed until burn depth is definitively identified. This study's aim is to assess the ability of hyperspectral imaging (HSI) to differentiate burn depth. METHODS Thermal injury of graded severity was generated on the dorsum of hairless mice with a heated brass rod. Perfusion and oxygenation parameters of injured skin were measured with HSI, a noninvasive method of diffuse reflectance spectroscopy, at 2 minutes, 1, 24, 48 and 72 hours after wounding. Burn depth was measured histologically in 12 mice from each burn group (n = 72) at 72 hours. RESULTS Three levels of burn depth were verified histologically: intermediate-dermal (ID), DD, and full-thickness. At 24 hours post injury, total hemoglobin (tHb) increased by 67% and 16% in ID and DD burns, respectively. In contrast, tHb decreased to 36% of its original levels in full-thickness burns. Differences in deoxygenated and tHb among all groups were significant (P < 0.001) at 24 hours post injury. CONCLUSIONS HSI was able to differentiate among 3 discrete levels of burn injury. This is likely because of its correlation with skin perfusion: superficial burn injury causes an inflammatory response and increased perfusion to the burn site, whereas deeper burns destroy the dermal microvasculature and a decrease in perfusion follows. This study supports further investigation of HSI in early burn depth assessment.
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43
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First results of a new hyperspectral camera system for chemical based wound analysis. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.wndm.2015.11.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Chin MS, Freniere BB, Lancerotto L, Lujan-Hernandez J, Saleeby JH, Lo YC, Orgill DP, Lalikos JF, Fitzgerald TJ. Hyperspectral Imaging as an Early Biomarker for Radiation Exposure and Microcirculatory Damage. Front Oncol 2015; 5:232. [PMID: 26579490 PMCID: PMC4620692 DOI: 10.3389/fonc.2015.00232] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Accepted: 10/05/2015] [Indexed: 11/13/2022] Open
Abstract
Background Radiation exposure can lead to detrimental effects in skin microcirculation. The precise relationship between radiation dose received and its effect on cutaneous perfusion still remains controversial. Previously, we have shown that hyperspectral imaging (HSI) is able to demonstrate long-term reductions in cutaneous perfusion secondary to chronic microvascular injury. This study characterizes the changes in skin microcirculation in response to varying doses of ionizing radiation and investigates these microcirculatory changes as a possible early non-invasive biomarker that may correlate with the extent of long-term microvascular damage. Methods Immunocompetent hairless mice (n = 66) were exposed to single fractions of superficial beta-irradiation in doses of 0, 5, 10, 20, 35, or 50 Gy. A HSI device was utilized to measure deoxygenated hemoglobin levels in irradiated and control areas. HSI measurements were performed at baseline before radiation exposure and for the first 3 days post-irradiation. Maximum macroscopic skin reactions were graded, and histological assessment of cutaneous microvascular densities at 4 weeks post-irradiation was performed in harvested tissue by CD31 immunohistochemistry. Results CD31 immunohistochemistry demonstrated a significant correlation (r = 0.90, p < 0.0001) between dose and vessel density reduction at 4 weeks. Using HSI analysis, early changes in deoxygenated hemoglobin levels were observed during the first 3 days post-irradiation in all groups. These deoxygenated hemoglobin changes varied proportionally with dose (r = 0.98, p < 0.0001) and skin reactions (r = 0.98, p < 0.0001). There was a highly significant correlation (r = 0.91, p < 0.0001) between these early changes in deoxygenated hemoglobin and late vascular injury severity assessed at the end of 4 weeks. Conclusion Radiation dose is directly correlated with cutaneous microvascular injury severity at 4 weeks in our model. Early post-exposure measurement of cutaneous deoxygenated hemoglobin levels may be a useful biomarker for radiation dose reconstruction and predictor for chronic microvascular injury.
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Affiliation(s)
- Michael S Chin
- Department of Radiation Oncology, University of Massachusetts Medical School , Worcester, MA , USA
| | - Brian B Freniere
- Division of Plastic Surgery, Brigham and Women's Hospital , Boston, MA , USA
| | - Luca Lancerotto
- Division of Plastic Surgery, Brigham and Women's Hospital , Boston, MA , USA
| | - Jorge Lujan-Hernandez
- Division of Plastic Surgery, University of Massachusetts Medical School , Worcester, MA , USA
| | - Jonathan H Saleeby
- Department of Radiation Oncology, University of Massachusetts Medical School , Worcester, MA , USA
| | - Yuan-Chyuan Lo
- Department of Radiation Oncology, University of Massachusetts Medical School , Worcester, MA , USA
| | - Dennis P Orgill
- Division of Plastic Surgery, Brigham and Women's Hospital , Boston, MA , USA
| | - Janice F Lalikos
- Division of Plastic Surgery, University of Massachusetts Medical School , Worcester, MA , USA
| | - Thomas J Fitzgerald
- Department of Radiation Oncology, University of Massachusetts Medical School , Worcester, MA , USA
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Gao L, Smith RT. Optical hyperspectral imaging in microscopy and spectroscopy - a review of data acquisition. JOURNAL OF BIOPHOTONICS 2015; 8:441-56. [PMID: 25186815 PMCID: PMC4348353 DOI: 10.1002/jbio.201400051] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Revised: 07/10/2014] [Accepted: 07/12/2014] [Indexed: 05/20/2023]
Abstract
Rather than simply acting as a photographic camera capturing two-dimensional (x, y) intensity images or a spectrometer acquiring spectra (λ), a hyperspectral imager measures entire three-dimensional (x, y, λ) datacubes for multivariate analysis, providing structural, molecular, and functional information about biological cells or tissue with unprecedented detail. Such data also gives clinical insights for disease diagnosis and treatment. We summarize the principles underpinning this technology, highlight its practical implementation, and discuss its recent applications at microscopic to macroscopic scales. Datacube acquisition strategies in hyperspectral imaging x, y, spatial coordinates; λ, wavelength.
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Affiliation(s)
- Liang Gao
- Department of Biomedical Engineering, Washington University in St. Louis, MO, 63139.
| | - R Theodore Smith
- Department of Ophthalmology, NYU School of Medicine, New York, NY, 10016.
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Lin JB, Phillips EH, Riggins TE, Sangha GS, Chakraborty S, Lee JY, Lycke RJ, Hernandez CL, Soepriatna AH, Thorne BRH, Yrineo AA, Goergen CJ. Imaging of small animal peripheral artery disease models: recent advancements and translational potential. Int J Mol Sci 2015; 16:11131-77. [PMID: 25993289 PMCID: PMC4463694 DOI: 10.3390/ijms160511131] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2015] [Accepted: 03/10/2015] [Indexed: 12/11/2022] Open
Abstract
Peripheral artery disease (PAD) is a broad disorder encompassing multiple forms of arterial disease outside of the heart. As such, PAD development is a multifactorial process with a variety of manifestations. For example, aneurysms are pathological expansions of an artery that can lead to rupture, while ischemic atherosclerosis reduces blood flow, increasing the risk of claudication, poor wound healing, limb amputation, and stroke. Current PAD treatment is often ineffective or associated with serious risks, largely because these disorders are commonly undiagnosed or misdiagnosed. Active areas of research are focused on detecting and characterizing deleterious arterial changes at early stages using non-invasive imaging strategies, such as ultrasound, as well as emerging technologies like photoacoustic imaging. Earlier disease detection and characterization could improve interventional strategies, leading to better prognosis in PAD patients. While rodents are being used to investigate PAD pathophysiology, imaging of these animal models has been underutilized. This review focuses on structural and molecular information and disease progression revealed by recent imaging efforts of aortic, cerebral, and peripheral vascular disease models in mice, rats, and rabbits. Effective translation to humans involves better understanding of underlying PAD pathophysiology to develop novel therapeutics and apply non-invasive imaging techniques in the clinic.
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Affiliation(s)
- Jenny B Lin
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Drive, Room 3025, West Lafayette, IN 47907, USA.
| | - Evan H Phillips
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Drive, Room 3025, West Lafayette, IN 47907, USA.
| | - Ti'Air E Riggins
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Drive, Room 3025, West Lafayette, IN 47907, USA.
| | - Gurneet S Sangha
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Drive, Room 3025, West Lafayette, IN 47907, USA.
| | - Sreyashi Chakraborty
- School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA.
| | - Janice Y Lee
- Psychological Sciences, Purdue University, West Lafayette, IN 47907, USA.
| | - Roy J Lycke
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Drive, Room 3025, West Lafayette, IN 47907, USA.
| | - Clarissa L Hernandez
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Drive, Room 3025, West Lafayette, IN 47907, USA.
| | - Arvin H Soepriatna
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Drive, Room 3025, West Lafayette, IN 47907, USA.
| | - Bradford R H Thorne
- School of Sciences, Neuroscience, Purdue University, West Lafayette, IN 47907, USA.
| | - Alexa A Yrineo
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Drive, Room 3025, West Lafayette, IN 47907, USA.
| | - Craig J Goergen
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Drive, Room 3025, West Lafayette, IN 47907, USA.
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Lu G, Qin X, Wang D, Chen ZG, Fei B. Estimation of Tissue Optical Parameters with Hyperspectral Imaging and Spectral Unmixing. PROCEEDINGS OF SPIE--THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING 2015; 9417. [PMID: 26855467 DOI: 10.1117/12.2082299] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Early detection of oral cancer and its curable precursors can improve patient survival and quality of life. Hyperspectral imaging (HSI) holds the potential for noninvasive early detection of oral cancer. The quantification of tissue chromophores by spectral unmixing of hyperspectral images could provide insights for evaluating cancer progression. In this study, non-negative matrix factorization has been applied for decomposing hyperspectral images into physiologically meaningful chromophore concentration maps. The approach has been validated by computer-simulated hyperspectral images and in vivo tumor hyperspectral images from a head and neck cancer animal model.
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Affiliation(s)
- Guolan Lu
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA
| | - Xulei Qin
- Department of Radiology and Imaging Sciences, Emory University, Atlanta, GA
| | - Dongsheng Wang
- Department of Hematology and Medical Oncology, Emory University, Atlanta, GA
| | - Zhuo Georgia Chen
- Department of Hematology and Medical Oncology, Emory University, Atlanta, GA
| | - Baowei Fei
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA; Department of Radiology and Imaging Sciences, Emory University, Atlanta, GA; Department of Mathematics & Computer Science, Emory University, Atlanta, GA; Winship Cancer Institute of Emory University, Atlanta, GA
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48
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Paul DW, Ghassemi P, Ramella-Roman JC, Prindeze NJ, Moffatt LT, Alkhalil A, Shupp JW. Noninvasive imaging technologies for cutaneous wound assessment: A review. Wound Repair Regen 2015; 23:149-62. [PMID: 25832563 DOI: 10.1111/wrr.12262] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Accepted: 01/22/2015] [Indexed: 02/02/2023]
Abstract
The ability to phenotype wounds for the purposes of assessing severity, healing potential and treatment is an important function of evidence-based medicine. A variety of optical technologies are currently in development for noninvasive wound assessment. To varying extents, these optical technologies have the potential to supplement traditional clinical wound evaluation and research, by providing detailed information regarding skin components imperceptible to visual inspection. These assessments are achieved through quantitative optical analysis of tissue characteristics including blood flow, collagen remodeling, hemoglobin content, inflammation, temperature, vascular structure, and water content. Technologies that have, to this date, been applied to wound assessment include: near infrared imaging, thermal imaging, optical coherence tomography, orthogonal polarization spectral imaging, fluorescence imaging, laser Doppler imaging, microscopy, spatial frequency domain imaging, photoacoustic detection, and spectral/hyperspectral imaging. We present a review of the technologies in use or development for these purposes with three aims: (1) providing basic explanations of imaging technology concepts, (2) reviewing the wound imaging literature, and (3) providing insight into areas for further application and exploration. Noninvasive imaging is a promising advancement in wound assessment and all technologies require further validation.
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Affiliation(s)
- Dereck W Paul
- The Firefighters' Burn and Surgical Research Laboratory, MedStar Health Research Institute, Washington, DC
| | - Pejhman Ghassemi
- Department of Electrical Engineering and Computer Science, The Catholic University of America, Washington, DC
| | - Jessica C Ramella-Roman
- Department of Biomedical Engineering and Herbert Wertheim College of Medicine, Florida International University, Miami, Florida
| | - Nicholas J Prindeze
- The Firefighters' Burn and Surgical Research Laboratory, MedStar Health Research Institute, Washington, DC
| | - Lauren T Moffatt
- The Firefighters' Burn and Surgical Research Laboratory, MedStar Health Research Institute, Washington, DC
| | - Abdulnaser Alkhalil
- The Firefighters' Burn and Surgical Research Laboratory, MedStar Health Research Institute, Washington, DC
| | - Jeffrey W Shupp
- The Firefighters' Burn and Surgical Research Laboratory, MedStar Health Research Institute, Washington, DC
- Department of Surgery, The Burn Center, MedStar Washington Hospital Center, Washington, DC
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Korpela E, Liu SK. Endothelial perturbations and therapeutic strategies in normal tissue radiation damage. Radiat Oncol 2014; 9:266. [PMID: 25518850 PMCID: PMC4279961 DOI: 10.1186/s13014-014-0266-7] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Accepted: 11/18/2014] [Indexed: 02/08/2023] Open
Abstract
Most cancer patients are treated with radiotherapy, but the treatment can also damage the surrounding normal tissue. Radiotherapy side-effects diminish patients’ quality of life, yet effective biological interventions for normal tissue damage are lacking. Protecting microvascular endothelial cells from the effects of irradiation is emerging as a targeted damage-reduction strategy. We illustrate the concept of the microvasculature as a mediator of overall normal tissue radiation toxicity through cell death, vascular inflammation (hemodynamic and molecular changes) and a change in functional capacity. Endothelial cell targeted therapies that protect against such endothelial cell perturbations and the development of acute normal tissue damage are mostly under preclinical development. Since acute radiation toxicity is a common clinical problem in cutaneous, gastrointestinal and mucosal tissues, we also focus on damage in these tissues.
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Affiliation(s)
- Elina Korpela
- Biological Sciences, Sunnybrook Research Institute and Odette Cancer Centre, Sunnybrook Health Sciences Centre, 2075 Bayview Ave., Toronto, M4N 3M5, Canada. .,Department of Medical Biophysics, University of Toronto, 101 College St., Toronto, M5G 1L7, Canada.
| | - Stanley K Liu
- Biological Sciences, Sunnybrook Research Institute and Odette Cancer Centre, Sunnybrook Health Sciences Centre, 2075 Bayview Ave., Toronto, M4N 3M5, Canada. .,Department of Medical Biophysics, University of Toronto, 101 College St., Toronto, M5G 1L7, Canada. .,Department of Radiation Oncology, University of Toronto, 149 College St., Toronto, M5T 1P5, Canada.
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The virtues of oxygenation: low tissue oxygen adversely affects the killing of Leishmania. J Invest Dermatol 2014; 134:2303-2305. [PMID: 25120145 DOI: 10.1038/jid.2014.232] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Hypoxia contributes to the persistence of infections through altered immune responses. Studies examining skin O2 changes at the site of a lesion are limited. The prevailing methods require the use of electrochemical O2 sensors or radiolabeled electrodes that utilize O2 and may interfere with the precision at low O2 levels. In this issue, Mahnke et al. (2014) demonstrate, using a novel fluorescence-based imaging technology, that low oxygen tension (pO2) impairs NO-mediated anti-leishmanial immunity, leading to increased parasite burden. Replenishing tissue oxygen profoundly enhanced NO-mediated leishmanial killing, underscoring the need to accurately assess oxygenation in infected tissues as a novel strategy to challenge intracellular infection. The technology presented here may have clinical-translational potential in noninvasively assessing disease burden and response to treatment.
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