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Genina EA, Lazareva EN, Surkov YI, Serebryakova IA, Shushunova NA. Optical parameters of healthy and tumor breast tissues in mice. JOURNAL OF BIOPHOTONICS 2024; 17:e202400123. [PMID: 38925916 DOI: 10.1002/jbio.202400123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 05/23/2024] [Accepted: 05/27/2024] [Indexed: 06/28/2024]
Abstract
Knowledge of the optical parameters of tumors is important for choosing the correct laser treatment parameters. In this paper, optical properties and refraction indices of breast tissue in healthy mice and a 4T1 model mimicking human breast cancer have been measured. A significant decrease in both the scattering and refractive index of tumor tissue has been observed. The change in tissue morphology has induced the change in the slope of the scattering spectrum. Thus, the light penetration depth into tumor has increased by almost 1.5-2 times in the near infrared "optical windows." Raman spectra have shown lower lipid content and higher protein content in tumor. The difference in the optical parameters of the tissues under study makes it possible to reliably differentiate them. The results may be useful for modeling the distribution of laser radiation in healthy tissues and cancers for deriving optimal irradiation conditions in photodynamic therapy.
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Affiliation(s)
- Elina A Genina
- Institute of Physics, Saratov State University, Saratov, Russia
- Laboratory of Laser Molecular Imaging and Machine Learning, Tomsk State University, Tomsk, Russia
| | - Ekaterina N Lazareva
- Institute of Physics, Saratov State University, Saratov, Russia
- Laboratory of Laser Molecular Imaging and Machine Learning, Tomsk State University, Tomsk, Russia
| | - Yuri I Surkov
- Institute of Physics, Saratov State University, Saratov, Russia
- Laboratory of Laser Molecular Imaging and Machine Learning, Tomsk State University, Tomsk, Russia
- Laboratory of Biomedical Photoacoustic, Saratov State University, Saratov, Russia
| | - Isabella A Serebryakova
- Institute of Physics, Saratov State University, Saratov, Russia
- Laboratory of Laser Molecular Imaging and Machine Learning, Tomsk State University, Tomsk, Russia
| | - Natalya A Shushunova
- Laboratory of Biomedical Photoacoustic, Saratov State University, Saratov, Russia
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2
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Costa S, Fang Q, Farrell T, Dao E, Farquharson M. Time-resolved fluorescence and diffuse reflectance for lung squamous carcinoma margin detection. Lasers Surg Med 2024; 56:279-287. [PMID: 38357847 DOI: 10.1002/lsm.23761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 12/26/2023] [Accepted: 01/13/2024] [Indexed: 02/16/2024]
Abstract
OBJECTIVES A major challenge in non-small cell lung cancer surgery is the occurrence of positive tumor margins. This may lead to the need for additional surgeries and has been linked to poor patient prognosis. This study aims to develop an in vivo surgical tool that can differentiate cancerous from noncancerous lung tissue at the margin. METHODS A time-resolved fluorescence and diffuse reflectance bimodal device was used to measure the lifetime, spectra, and intensities of endogenous fluorophores as well as optical properties of lung tissue. The tumor and fibrotic tissue data, each containing 36 samples, was obtained from patients who underwent surgical removal of lung tissue after being diagnosed with squamous carcinoma but before any other treatment was administered. The normal lung tissue data were obtained from nine normal tissue samples. RESULTS The results show a statistically significant difference between cancerous and noncancerous tissue. The results also show a difference in metabolic related optical properties between fibrotic and normal lung tissue samples. CONCLUSIONS This work demonstrates the feasibility of a device that can differentiate cancerous and noncancerous lung tissue for patients diagnosed with squamous cell carcinoma.
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Affiliation(s)
- Sarah Costa
- Department of Physics, McMaster University, Ontario, Hamilton, Canada
| | - Qiyin Fang
- Department of Engineering Physics, Faculty of Engineering, McMaster University, Ontario, Hamilton, Canada
| | - Thomas Farrell
- Radiation Physics Program, Juravinski Cancer Centre, Ontario, Hamilton, Canada
| | - Erica Dao
- Department of Physics, McMaster University, Ontario, Hamilton, Canada
| | - Michael Farquharson
- Department of Interdisciplinary Science, McMaster University, Ontario, Hamilton, Canada
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3
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Chen YY, Tzeng SY, Yen YY, Cheng NY, Tseng SH. Non-invasive assessment of skin hydration and sensation with diffuse reflectance spectroscopy. Sci Rep 2023; 13:20149. [PMID: 37978237 PMCID: PMC10656448 DOI: 10.1038/s41598-023-47349-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 11/12/2023] [Indexed: 11/19/2023] Open
Abstract
The skin is a vital organ in the human body, providing essential functions such as protection, sensation, and metabolism. Skin hydration is one of the crucial factors in maintaining normal skin function. Insufficient skin hydration can lead to dryness, shedding of the stratum corneum, a decrease in skin barrier function, and may cause skin inflammation. Therefore, maintaining or improving skin hydration is critical in promoting healthy skin. Currently, the commonly used method for measuring skin hydration is bioelectrical capacitance analysis, which is often affected by environmental humidity and can only provide limited information. To overcome these limitations, this study used diffuse reflectance spectroscopy (DRS) in the wavelength range of 400-1000 nm to quantify skin absorption and scattering modulation caused by changes in skin hydration states. The advantages of this technique include rapid measurements, non-invasiveness, a straightforward optical setup, and suitability for prolonged skin monitoring. We found that DRS-derived skin absorption coefficients had a correlation coefficient of 0.93 with the skin capacitance at various skin hydration states. In addition, our findings reveal that absorption and scattering coefficients may be useful in discerning skin hydration enhancement induced by applying soaked cotton pads or cosmeceutical facial masks, as well as evaluating skin sensation. This study verifies that the DRS method could be a convenient and effective tool for evaluating skin hydration related information.
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Affiliation(s)
- Ying-Yu Chen
- Department of Photonics, National Cheng-Kung University, Tainan, 701, Taiwan, ROC
| | - Shih-Yu Tzeng
- Research Development and Innovation Center, Show Chwan Health Care System, Changhua City, 500, Taiwan, ROC
| | - Yun-Yo Yen
- Department of Photonics, National Cheng-Kung University, Tainan, 701, Taiwan, ROC
| | - Nan-Yu Cheng
- Department of Health-Business Administration, Fooyin University, Kaohsiung, 831, Taiwan, ROC
| | - Sheng-Hao Tseng
- Department of Photonics, National Cheng-Kung University, Tainan, 701, Taiwan, ROC.
- School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, 807, Taiwan, ROC.
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Dao E, Gohla G, Williams P, Lovrics P, Badr F, Fang Q, Farrell T, Farquharson M. Breast tissue analysis using a clinically compatible combined time-resolved fluorescence and diffuse reflectance (TRF-DR) system. Lasers Surg Med 2023; 55:769-783. [PMID: 37526280 DOI: 10.1002/lsm.23710] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 06/29/2023] [Accepted: 07/11/2023] [Indexed: 08/02/2023]
Abstract
OBJECTIVE This work aims to develop a clinically compatible system that can perform breast tissue analysis in a more time efficient process than conventional histopathological assessment. The potential for such a system to be used in vivo in the operating room or surgical suite to improve patient outcome is investigated. METHOD In this work, 80 matched pairs of invasive ductal carcinoma and adjacent normal breast tissue were measured in a combined time-resolved fluorescence and diffuse reflectance (DA) system. Following measurement, the fluorescence intensity of collagen and flavin adenine dinucleotide (FAD); the fluorescence lifetime of collagen, nicotinamide adenine dinucleotide (NADH), and FAD; the DA; absorption coefficient; and reduced scattering coefficient were extracted. Samples then underwent histological processing and H&E staining to classify composition as tumor, fibroglandular, and/or adipose tissue. RESULTS Statistically significant differences in the collagen and FAD fluorescence intensity, collagen and FAD fluorescence lifetime, DA, and scattering coefficient were found between each tissue group. The NADH fluorescence lifetime and absorption coefficient were statistically different between the tumor and fibroglandular groups, and the tumor and adipose groups. While many breast tissue analysis studies label fibroglandular and adipose together as "normal" breast tissue, this work indicates that some differences between tumor and fibroglandular tissue are not the same as differences between tumor and adipose tissue. Observations of the reduced scatter coefficient may also indicate further classification to include fibro-adipose may be necessary. Future work would benefit from the additional tissue classification. CONCLUSION With observable differences in optical parameters between the three tissue types, this system shows promise as a breast analysis tool in a clinical setting. With further work involving samples of mixed composition, this combined system could potentially be used intraoperatively for rapid margin assessment.
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Affiliation(s)
- Erica Dao
- Department of Physics & Astronomy, McMaster University, Hamilton, Canada
| | - Gabriela Gohla
- St. Joseph's Healthcare, Hamilton, Canada
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Canada
| | - Phillip Williams
- St. Joseph's Healthcare, Hamilton, Canada
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Canada
| | - Peter Lovrics
- St. Joseph's Healthcare, Hamilton, Canada
- Department of Surgery, McMaster University, Hamilton, Canada
| | - Fares Badr
- Department of Engineering Physics, McMaster University, Hamilton, Canada
| | - Qiyin Fang
- Department of Engineering Physics, McMaster University, Hamilton, Canada
| | - Thomas Farrell
- School of Interdisciplinary Science, Hamilton, Canada
- Juravinski Hospital and Cancer Center, Hamilton, Canada
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Chaudhry N, Albinsson J, Cinthio M, Kröll S, Malmsjö M, Rydén L, Sheikh R, Reistad N, Zackrisson S. Breast Cancer Diagnosis Using Extended-Wavelength-Diffuse Reflectance Spectroscopy (EW-DRS)-Proof of Concept in Ex Vivo Breast Specimens Using Machine Learning. Diagnostics (Basel) 2023; 13:3076. [PMID: 37835819 PMCID: PMC10572577 DOI: 10.3390/diagnostics13193076] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 09/24/2023] [Accepted: 09/26/2023] [Indexed: 10/15/2023] Open
Abstract
This study aims to investigate the feasibility of using diffuse reflectance spectroscopy (DRS) to distinguish malignant breast tissue from adjacent healthy tissue, and to evaluate if an extended-wavelength range (450-1550 nm) has an advantage over the standard wavelength range (450-900 nm). Multivariate statistics and machine learning algorithms, either linear discriminant analysis (LDA) or support vector machine (SVM) are used to distinguish the two tissue types in breast specimens (total or partial mastectomy) from 23 female patients with primary breast cancer. EW-DRS has a sensitivity of 94% and specificity of 91% as compared to a sensitivity of 40% and specificity of 71% using the standard wavelength range. The results suggest that DRS can discriminate between malignant and healthy breast tissue, with improved outcomes using an extended wavelength. It is also possible to construct a simple analytical model to improve the diagnostic performance of the DRS technique.
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Affiliation(s)
- Nadia Chaudhry
- Department of Translational Medicine, Diagnostic Radiology, Lund University, 205 02 Malmö, Sweden;
- Department of Medical Imaging and Physiology, Skåne University Hospital, 214 28 Malmö, Sweden
| | - John Albinsson
- Department of Clinical Sciences Lund, Ophthalmology, Skåne University Hospital, Lund University, 223 62 Lund, Sweden; (J.A.); (M.M.)
| | - Magnus Cinthio
- Department of Biomedical Engineering, Lund University, 221 00 Lund, Sweden;
| | - Stefan Kröll
- Department of Physics, Lund University, 221 00 Lund, Sweden; (S.K.); (N.R.)
| | - Malin Malmsjö
- Department of Clinical Sciences Lund, Ophthalmology, Skåne University Hospital, Lund University, 223 62 Lund, Sweden; (J.A.); (M.M.)
| | - Lisa Rydén
- Department of Surgery, Skåne University Hospital, 205 02 Malmö, Sweden
- Department of Clinical Sciences Lund, Surgery, Lund University, 221 85 Lund, Sweden
| | - Rafi Sheikh
- Department of Clinical Sciences Lund, Ophthalmology, Skåne University Hospital, Lund University, 223 62 Lund, Sweden; (J.A.); (M.M.)
| | - Nina Reistad
- Department of Physics, Lund University, 221 00 Lund, Sweden; (S.K.); (N.R.)
| | - Sophia Zackrisson
- Department of Translational Medicine, Diagnostic Radiology, Lund University, 205 02 Malmö, Sweden;
- Department of Medical Imaging and Physiology, Skåne University Hospital, 214 28 Malmö, Sweden
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Shanthakumar D, Leiloglou M, Kelliher C, Darzi A, Elson DS, Leff DR. A Comparison of Spectroscopy and Imaging Techniques Utilizing Spectrally Resolved Diffusely Reflected Light for Intraoperative Margin Assessment in Breast-Conserving Surgery: A Systematic Review and Meta-Analysis. Cancers (Basel) 2023; 15:cancers15112884. [PMID: 37296847 DOI: 10.3390/cancers15112884] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 05/12/2023] [Accepted: 05/16/2023] [Indexed: 06/12/2023] Open
Abstract
Up to 19% of patients require re-excision surgery due to positive margins in breast-conserving surgery (BCS). Intraoperative margin assessment tools (IMAs) that incorporate tissue optical measurements could help reduce re-excision rates. This review focuses on methods that use and assess spectrally resolved diffusely reflected light for breast cancer detection in the intraoperative setting. Following PROSPERO registration (CRD42022356216), an electronic search was performed. The modalities searched for were diffuse reflectance spectroscopy (DRS), multispectral imaging (MSI), hyperspectral imaging (HSI), and spatial frequency domain imaging (SFDI). The inclusion criteria encompassed studies of human in vivo or ex vivo breast tissues, which presented data on accuracy. The exclusion criteria were contrast use, frozen samples, and other imaging adjuncts. 19 studies were selected following PRISMA guidelines. Studies were divided into point-based (spectroscopy) or whole field-of-view (imaging) techniques. A fixed-or random-effects model analysis generated pooled sensitivity/specificity for the different modalities, following heterogeneity calculations using the Q statistic. Overall, imaging-based techniques had better pooled sensitivity/specificity (0.90 (CI 0.76-1.03)/0.92 (CI 0.78-1.06)) compared with probe-based techniques (0.84 (CI 0.78-0.89)/0.85 (CI 0.79-0.91)). The use of spectrally resolved diffusely reflected light is a rapid, non-contact technique that confers accuracy in discriminating between normal and malignant breast tissue, and it constitutes a potential IMA tool.
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Affiliation(s)
- Dhurka Shanthakumar
- Department of Surgery and Cancer, Imperial College London, London W12 0HS, UK
- The Hamlyn Centre, Imperial College London, London SW7 2AZ, UK
| | - Maria Leiloglou
- Department of Surgery and Cancer, Imperial College London, London W12 0HS, UK
- The Hamlyn Centre, Imperial College London, London SW7 2AZ, UK
| | - Colm Kelliher
- Department of Surgery and Cancer, Imperial College London, London W12 0HS, UK
| | - Ara Darzi
- Department of Surgery and Cancer, Imperial College London, London W12 0HS, UK
- The Hamlyn Centre, Imperial College London, London SW7 2AZ, UK
| | - Daniel S Elson
- Department of Surgery and Cancer, Imperial College London, London W12 0HS, UK
- The Hamlyn Centre, Imperial College London, London SW7 2AZ, UK
| | - Daniel R Leff
- Department of Surgery and Cancer, Imperial College London, London W12 0HS, UK
- The Hamlyn Centre, Imperial College London, London SW7 2AZ, UK
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7
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Optical spectroscopy and chemometrics in intraoperative tumor margin assessment. Trends Analyt Chem 2023. [DOI: 10.1016/j.trac.2023.116955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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8
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Reistad N, Sturesson C. Distinguishing tumor from healthy tissue in human liver ex vivo using machine learning and multivariate analysis of diffuse reflectance spectra. JOURNAL OF BIOPHOTONICS 2022; 15:e202200140. [PMID: 35860880 DOI: 10.1002/jbio.202200140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 06/27/2022] [Accepted: 07/12/2022] [Indexed: 06/15/2023]
Abstract
The aim of this work was to evaluate the capability of diffuse reflectance spectroscopy to distinguish malignant liver tissues from surrounding tissues and to determine whether an extended wavelength range (450-1550 nm) offers any advantages over using the conventional wavelength range. Furthermore, multivariate analysis combined with a machine learning algorithm, either linear discriminant analysis or the more advanced support vector machine, was used to discriminate between and classify freshly excised human liver specimens from 18 patients. Tumors were distinguished from surrounding liver tissues with a sensitivity of 99%, specificity of 100%, classification rate of 100% and a Matthews correlation coefficient of 100% using the extended wavelength range and a combination of principal component analysis and support vector techniques. The results indicate that this technology may be useful in clinical applications for real-time tissue diagnostics of tumor margins where rapid classification is important.
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Affiliation(s)
- Nina Reistad
- Department of Physics, Lund University, Lund, Sweden
| | - Christian Sturesson
- Division of Surgery, Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
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9
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Zherebtsov EA, Potapova EV, Mamoshin AV, Shupletsov VV, Kandurova KY, Dremin VV, Abramov AY, Dunaev AV. Fluorescence lifetime needle optical biopsy discriminates hepatocellular carcinoma. BIOMEDICAL OPTICS EXPRESS 2022; 13:633-646. [PMID: 35284175 PMCID: PMC8884204 DOI: 10.1364/boe.447687] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 11/30/2021] [Accepted: 11/30/2021] [Indexed: 05/06/2023]
Abstract
This work presents results of in vivo and in situ measurements of hepatocellular carcinoma by a developed optical biopsy system. Here, we describe the technical details of the implementation of fluorescence lifetime and diffuse reflectance measurements by the system, equipped with an original needle optical probe, compatible with the 17.5G biopsy needle standard. The fluorescence lifetime measurements observed by the setup were verified in fresh solutions of NADH and FAD++, and then applied in a murine model for the characterisation of inoculated hepatocellular carcinoma (HCC) and adjacent liver tissue. The technique, applied in vivo and in situ and supplemented by measurements of blood oxygen saturation, made it possible to reveal statistically significant transformation in the set of measured parameters linked with the cellular pools of NADH and NADPH. In the animal model, we demonstrate that the characteristic changes in registered fluorescent parameters can be used to reliably distinguish the HCC tissue, liver tissue in the control, and the metabolically changed liver tissues of animals with the developed HCC tumour. For further transition to clinical applications, the optical biopsy system was tested during the routing procedure of the PNB in humans with suspected HCC. The comparison of the data from murine and human HCC tissues suggests that the tested animal model is generally representative in the sense of the registered fluorescence lifetime parameters, while statistically significant differences between their absolute values can still be observed.
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Affiliation(s)
- Evgenii A Zherebtsov
- Research & Development Center of Biomedical Photonics, Orel State University, Orel, Russia
- Optoelectronics and Measurement Techniques unit, University of Oulu, Oulu, Finland
- Co-first authors with equal contribution
| | - Elena V Potapova
- Research & Development Center of Biomedical Photonics, Orel State University, Orel, Russia
- Co-first authors with equal contribution
| | - Andrian V Mamoshin
- Research & Development Center of Biomedical Photonics, Orel State University, Orel, Russia
- Orel Regional Clinical Hospital, Orel, Russia
| | - Valery V Shupletsov
- Research & Development Center of Biomedical Photonics, Orel State University, Orel, Russia
| | - Ksenia Y Kandurova
- Research & Development Center of Biomedical Photonics, Orel State University, Orel, Russia
| | - Viktor V Dremin
- Research & Development Center of Biomedical Photonics, Orel State University, Orel, Russia
- College of Engineering and Physical Sciences, Aston University, Birmingham, UK
| | - Andrey Y Abramov
- Research & Development Center of Biomedical Photonics, Orel State University, Orel, Russia
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK
| | - Andrey V Dunaev
- Research & Development Center of Biomedical Photonics, Orel State University, Orel, Russia
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Balasundaram G, Krafft C, Zhang R, Dev K, Bi R, Moothanchery M, Popp J, Olivo M. Biophotonic technologies for assessment of breast tumor surgical margins-A review. JOURNAL OF BIOPHOTONICS 2021; 14:e202000280. [PMID: 32951321 DOI: 10.1002/jbio.202000280] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Revised: 09/15/2020] [Accepted: 09/18/2020] [Indexed: 06/11/2023]
Abstract
Breast conserving surgery (BCS) offering similar surgical outcomes as mastectomy while retaining breast cosmesis is becoming increasingly popular for the management of early stage breast cancers. However, its association with reoperation rates of 20% to 40% following incomplete tumor removal warrants the need for a fast and accurate intraoperative surgical margin assessment tool that offers cellular, structural and molecular information of the whole specimen surface to a clinically relevant depth. Biophotonic technologies are evolving to qualify as such an intraoperative tool for clinical assessment of breast cancer surgical margins at the microscopic and macroscopic scale. Herein, we review the current research in the application of biophotonic technologies such as photoacoustic imaging, Raman spectroscopy, multimodal multiphoton imaging, diffuse optical imaging and fluorescence imaging using medically approved dyes for breast cancer detection and/or tumor subtype differentiation toward intraoperative assessment of surgical margins in BCS specimens, and possible challenges in their route to clinical translation.
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Affiliation(s)
- Ghayathri Balasundaram
- Singapore Bioimaging Consortium, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | | | - Ruochong Zhang
- Singapore Bioimaging Consortium, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Kapil Dev
- Singapore Bioimaging Consortium, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Renzhe Bi
- Singapore Bioimaging Consortium, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Mohesh Moothanchery
- Singapore Bioimaging Consortium, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Jürgen Popp
- Leibniz Institute of Photonic Technology, Jena, Germany
- Institute of Physical Chemistry and Abbe Center of Photonics, University Jena, Jena, Germany
| | - Malini Olivo
- Singapore Bioimaging Consortium, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
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11
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Liu W, Jin X, Li J, Xue Y, Li Y, Qian Z, Li W, Yan X. Study of cervical precancerous lesions detection by spectroscopy and support vector machine. MINIM INVASIV THER 2020; 30:208-214. [PMID: 32347137 DOI: 10.1080/13645706.2020.1723111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
BACKGROUND AND OBJECTIVE Diffuse reflectance spectroscopy (DRS) offers a fast, non-invasive, and low-cost alternative for cervical cancer diagnosis. We aim to develop a method for screening precancerous lesions based on DRS. MATERIAL AND METHODS Characteristic parameters of cervical tissue were extracted from spectra, including optical characteristic parameters such as absorption and scattering coefficients, and some slope and area parameters of the spectrum. Data were randomly divided into training (60%) and test (40%) sets. Of the 210 included patients, 166 were healthy, 22 had erosion of the cervix, and 31 had cervical intraepithelial neoplasia (CIN). The support vector machine (SVM) algorithm was used to classify normal and abnormal cervical tissue based on 11 characteristic parameters. RESULTS The SVM with linear kernel function, applied on the training data, could distinguish tissue with lesions from healthy tissue with an accuracy of 1.00. When the classifiers were applied to the test set, erosion of cervix and CIN could be discriminated from healthy tissue with an accuracy of 0.95 (±0.03). CONCLUSIONS This research shows that the diagnostic algorithm can be valuable for non-invasive diagnosis of cervical cancer. This is a significant step toward the development of a tool for tissue assessment of cervical cancer.
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Affiliation(s)
- Wenwen Liu
- Department of Biomedical Engineering, College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China
| | - Xiaofei Jin
- Department of Biomedical Engineering, College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China
| | - Junjun Li
- Department of Biomedical Engineering, College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China
| | - Yanbai Xue
- Department of Biomedical Engineering, College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China
| | - Yiran Li
- Department of Biomedical Engineering, College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China
| | - Zhiyu Qian
- Department of Biomedical Engineering, College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China
| | - Weitao Li
- Department of Biomedical Engineering, College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China
| | - Xuemei Yan
- Department of Gynecology, Nanjing BenQ Hospital Co Ltd, Nanjing, China
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12
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Ma Z, Zhou J, Shao Y, Jafari FA, Qi P, Li Y. Biochemical properties and progress in cancers of tRNA-derived fragments. J Cell Biochem 2019; 121:2058-2063. [PMID: 31674076 DOI: 10.1002/jcb.29492] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Accepted: 10/08/2019] [Indexed: 01/01/2023]
Abstract
tRNA-derived small RNAs (tRFs), a kind of noncoding RNAs, are generated from transfer RNAs. tRFs have some types according to their source and sizes. They play important roles in cell life and carcinogenesis. In this paper, we review the biogenesis and biological properties. We also focus on current progress of tRFs and some tsRNAs such as tRF-Leu-CAG, which have been studied or will be further investigated in tumorgenesis and diagnostic biomarkers in the clinic.
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Affiliation(s)
- Zhongliang Ma
- Lab for Noncoding RNA & Cancer, School of Life Sciences, Shanghai University, Shanghai, China
| | - Jinbao Zhou
- Lab for Noncoding RNA & Cancer, School of Life Sciences, Shanghai University, Shanghai, China
| | - Yang Shao
- Lab for Noncoding RNA & Cancer, School of Life Sciences, Shanghai University, Shanghai, China
| | - Fatemah A Jafari
- Lab for Noncoding RNA & Cancer, School of Life Sciences, Shanghai University, Shanghai, China
| | - Pengfei Qi
- Lab for Noncoding RNA & Cancer, School of Life Sciences, Shanghai University, Shanghai, China
| | - Yanli Li
- Lab for Noncoding RNA & Cancer, School of Life Sciences, Shanghai University, Shanghai, China
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13
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Multispectral Depth-Resolved Fluorescence Lifetime Spectroscopy Using SPAD Array Detectors and Fiber Probes. SENSORS 2019; 19:s19122678. [PMID: 31200569 PMCID: PMC6631026 DOI: 10.3390/s19122678] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 06/10/2019] [Accepted: 06/12/2019] [Indexed: 01/29/2023]
Abstract
Single Photon Avalanche Diode (SPAD) arrays are increasingly exploited and have demonstrated potential in biochemical and biomedical research, both for imaging and single-point spectroscopy applications. In this study, we explore the application of SPADs together with fiber-optic-based delivery and collection geometry to realize fast and simultaneous single-point time-, spectral-, and depth-resolved fluorescence measurements at 375 nm excitation light. Spectral information is encoded across the columns of the array through grating-based dispersion, while depth information is encoded across the rows thanks to a linear arrangement of probe collecting fibers. The initial characterization and validation were realized against layered fluorescent agarose-based phantoms. To verify the practicality and feasibility of this approach in biological specimens, we measured the fluorescence signature of formalin-fixed rabbit aorta samples derived from an animal model of atherosclerosis. The initial results demonstrate that this detection configuration can report fluorescence spectral and lifetime contrast originating at different depths within the specimens. We believe that our optical scheme, based on SPAD array detectors and fiber-optic probes, constitute a powerful and versatile approach for the deployment of multidimensional fluorescence spectroscopy in clinical applications where information from deeper tissue layers is important for diagnosis.
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