1
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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:e202400123. [PMID: 38925916 DOI: 10.1002/jbio.202400123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [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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Aleksandrova PV, Zaytsev KI, Nikitin PV, Alekseeva AI, Zaitsev VY, Dolganov KB, Reshetov IV, Karalkin PA, Kurlov VN, Tuchin VV, Dolganova IN. Quantification of attenuation and speckle features from endoscopic OCT images for the diagnosis of human brain glioma. Sci Rep 2024; 14:10722. [PMID: 38729956 PMCID: PMC11087587 DOI: 10.1038/s41598-024-61292-z] [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: 11/07/2023] [Accepted: 05/03/2024] [Indexed: 05/12/2024] Open
Abstract
Application of optical coherence tomography (OCT) in neurosurgery mostly includes the discrimination between intact and malignant tissues aimed at the detection of brain tumor margins. For particular tissue types, the existing approaches demonstrate low performance, which stimulates the further research for their improvement. The analysis of speckle patterns of brain OCT images is proposed to be taken into account for the discrimination between human brain glioma tissue and intact cortex and white matter. The speckle properties provide additional information of tissue structure, which could help to increase the efficiency of tissue differentiation. The wavelet analysis of OCT speckle patterns was applied to extract the power of local brightness fluctuations in speckle and its standard deviation. The speckle properties are analysed together with attenuation ones using a set of ex vivo brain tissue samples, including glioma of different grades. Various combinations of these features are considered to perform linear discriminant analysis for tissue differentiation. The results reveal that it is reasonable to include the local brightness fluctuations at first two wavelet decomposition levels in the analysis of OCT brain images aimed at neurosurgical diagnosis.
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Affiliation(s)
- P V Aleksandrova
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia, 119991.
| | - K I Zaytsev
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia, 119991
| | - P V Nikitin
- Department of Biomedical Engineering, University of Houston, Houston, TX, USA
- N.N. Burdenko National Medical Research Center for Neurosurgery, Moscow, Russia, 125047
| | - A I Alekseeva
- Avtsyn Research Institute of Human Morphology, FSBSI "Petrovsky National Research Centre of Surgery", Moscow, Russia, 117418
| | - V Y Zaitsev
- A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences, Nizhny Novgorod, Russia, 603950
| | - K B Dolganov
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia, 119991
| | - I V Reshetov
- Institute for Cluster Oncology, Sechenov First Moscow State Medical University, Moscow, Russia, 119991
| | - P A Karalkin
- Institute for Cluster Oncology, Sechenov First Moscow State Medical University, Moscow, Russia, 119991
| | - V N Kurlov
- Osipyan Institute of Solid State Physics of the Russian Academy of Sciences, Chernogolovka, Russia, 142432
| | - V V Tuchin
- Science Medical Center, Saratov State University, Saratov, Russia, 410000
- Institute of Precision Mechanics and Control, FRC "Saratov Scientific Centre of the Russian Academy of Sciences", Saratov, Russia, 410028
- Tomsk State University, Tomsk, Russia, 634050
| | - I N Dolganova
- Osipyan Institute of Solid State Physics of the Russian Academy of Sciences, Chernogolovka, Russia, 142432.
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3
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Li K, Wu Q, Feng S, Zhao H, Jin W, Qiu H, Gu Y, Chen D. In situ detection of human glioma based on tissue optical properties using diffuse reflectance spectroscopy. JOURNAL OF BIOPHOTONICS 2023; 16:e202300195. [PMID: 37589177 DOI: 10.1002/jbio.202300195] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Revised: 07/18/2023] [Accepted: 08/15/2023] [Indexed: 08/18/2023]
Abstract
Safely maximizing brain cancer removal without injuring adjacent healthy tissue is crucial for optimal treatment outcomes. However, it is challenging to distinguish cancer from noncancer intraoperatively. This study aimed to explore the feasibility of diffuse reflectance spectroscopy (DRS) as a label-free and real-time detection technology for discrimination between brain cancer and noncancer tissues. Fifty-five fresh cancer and noncancer specimens from 19 brain surgeries were measured with DRS, and the results were compared with co-registered clinical standard histopathology. Tissue optical properties were quantitatively obtained from the diffuse reflectance spectra and compared among different types of brain tissues. A machine learning-based classifier was trained to differentiate cancerous versus noncancerous tissues. Our method could achieve a sensitivity of 93% and specificity of 95% for discriminating high-grade glioma from normal white matter. Our results showed that DRS has the potential to be used for label-free, real-time in vivo cancer detection during brain surgery.
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Affiliation(s)
- Kerui Li
- School of Medical Technology, Beijing Institute of Technology, Beijing, China
| | - Qijia Wu
- Department of Neurosurgery, First Medical Center of PLA General Hospital, Beijing, China
| | - Shiyu Feng
- Department of Neurosurgery, First Medical Center of PLA General Hospital, Beijing, China
| | - Hongyou Zhao
- School of Medical Technology, Beijing Institute of Technology, Beijing, China
| | - Wei Jin
- Department of Pathology, Chinese PLA General Hospital, Beijing, China
| | - Haixia Qiu
- Department of Laser Medicine, First Medical Center of PLA General Hospital, Beijing, China
| | - Ying Gu
- School of Medical Technology, Beijing Institute of Technology, Beijing, China
- Department of Laser Medicine, First Medical Center of PLA General Hospital, Beijing, China
- Precision Laser Medical Diagnosis and Treatment Innovation Unit, Chinese Academy of Medical Sciences, Beijing, China
| | - Defu Chen
- School of Medical Technology, Beijing Institute of Technology, Beijing, China
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4
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Martins IS, Silva HF, Lazareva EN, Chernomyrdin NV, Zaytsev KI, Oliveira LM, Tuchin VV. Measurement of tissue optical properties in a wide spectral range: a review [Invited]. BIOMEDICAL OPTICS EXPRESS 2023; 14:249-298. [PMID: 36698664 PMCID: PMC9841994 DOI: 10.1364/boe.479320] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 11/29/2022] [Accepted: 11/29/2022] [Indexed: 06/17/2023]
Abstract
A distinctive feature of this review is a critical analysis of methods and results of measurements of the optical properties of tissues in a wide spectral range from deep UV to terahertz waves. Much attention is paid to measurements of the refractive index of biological tissues and liquids, the knowledge of which is necessary for the effective application of many methods of optical imaging and diagnostics. The optical parameters of healthy and pathological tissues are presented, and the reasons for their differences are discussed, which is important for the discrimination of pathologies and the demarcation of their boundaries. When considering the interaction of terahertz radiation with tissues, the concept of an effective medium is discussed, and relaxation models of the effective optical properties of tissues are presented. Attention is drawn to the manifestation of the scattering properties of tissues in the THz range and the problems of measuring the optical properties of tissues in this range are discussed. In conclusion, a method for the dynamic analysis of the optical properties of tissues under optical clearing using an application of immersion agents is presented. The main mechanisms and technologies of optical clearing, as well as examples of the successful application for differentiation of healthy and pathological tissues, are analyzed.
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Affiliation(s)
- Inês S. Martins
- Center for Innovation in Engineering and Industrial Technology, ISEP, Porto, Portugal
| | - Hugo F. Silva
- Porto University, School of Engineering, Porto, Portugal
| | - Ekaterina N. Lazareva
- Science Medical Center, Saratov State University, Saratov, Russia
- Laboratory of Laser Molecular Imaging and Machine Learning, Tomsk State University, Tomsk, Russia
| | | | - Kirill I. Zaytsev
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia
| | - Luís M. Oliveira
- Physics Department, Polytechnic of Porto – School of Engineering (ISEP), Porto, Portugal
- Institute for Systems and Computer Engineering, Technology and Science (INESC TEC), Porto, Portugal
| | - Valery V. Tuchin
- Science Medical Center, Saratov State University, Saratov, Russia
- Laboratory of Laser Molecular Imaging and Machine Learning, Tomsk State University, Tomsk, Russia
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5
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Sirotin MA, Romodina MN, Lyubin EV, Soboleva IV, Fedyanin AA. Single-cell all-optical coherence elastography with optical tweezers. BIOMEDICAL OPTICS EXPRESS 2022; 13:14-25. [PMID: 35154850 PMCID: PMC8803033 DOI: 10.1364/boe.444813] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 11/19/2021] [Accepted: 11/22/2021] [Indexed: 06/01/2023]
Abstract
The elastic properties of cells are important for many of their functions, however the development of label free noninvasive cellular elastography method is a challenging topic. We present a novel single-cell all-optical coherence elastography method that combines optical tweezers producing mechanical excitation on the cell membrane or organelle and phase-sensitive optical coherence microscopy measuring sample response and determining its mechanical properties. The method allows living cells imaging with a lateral resolution of 0.5 μm and an axial resolution up to 10 nm, making it possible to detect nanometer displacements of the cell organelles and to record the propagation of mechanical wave along the cell membrane in response to optical tweezers excitation. We also demonstrate applicability of the method on single living red blood cells, yeast and cancer cells. The all-optical nature of the method developed makes it a promising and easily applicable tool for studying cellular and subcellular mechanics in vivo.
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Affiliation(s)
- Maxim A. Sirotin
- Faculty of Physics, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Maria N. Romodina
- Faculty of Physics, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Evgeny V. Lyubin
- Faculty of Physics, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Irina V. Soboleva
- Faculty of Physics, Lomonosov Moscow State University, Moscow 119991, Russia
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow 119071, Russia
| | - Andrey A. Fedyanin
- Faculty of Physics, Lomonosov Moscow State University, Moscow 119991, Russia
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6
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Dolganova IN, Varvina DA, Shikunova IA, Alekseeva AI, Karalkin PA, Kuznetsov MR, Nikitin PV, Zotov AK, Mukhina EE, Katyba GM, Zaytsev KI, Tuchin VV, Kurlov VN. Proof of concept for the sapphire scalpel combining tissue dissection and optical diagnosis. Lasers Surg Med 2021; 54:611-622. [PMID: 34918347 DOI: 10.1002/lsm.23509] [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: 07/13/2021] [Revised: 10/18/2021] [Accepted: 11/27/2021] [Indexed: 11/08/2022]
Abstract
OBJECTIVES The development of compact diagnostic probes and instruments with an ability to direct access to organs and tissues and integration of these instruments into surgical workflows is an important task of modern physics and medicine. The need for such tools is essential for surgical oncology, where intraoperative visualization and demarcation of tumor margins define further prognosis and survival of patients. In this paper, the possible solution for this intraoperative imaging problem is proposed and its feasibility to detect tumorous tissue is studied experimentally. METHODS For this aim, the sapphire scalpel was developed and fabricated using the edge-defined film-fed growth technique aided by mechanical grinding, polishing, and chemical sharpening of the cutting edge. It possesses optical transparency, mechanical strength, chemical inertness, and thermal resistance alongside the presence of the as-grown hollow capillary channels in its volume for accommodating optical fibers. The rounding of the cutting edge exceeds the same for metal scalpels and can be as small as 110 nm. Thanks to these features, sapphire scalpel combines tissue dissection with light delivering and optical diagnosis. The feasibility for the tumor margin detection was studied, including both gelatin-based tissue phantoms and ex vivo freshly excised specimens of the basal cell carcinoma from humans and the glioma model 101.8 from rats. These tumors are commonly diagnosed either non-invasively or intraoperatively using different modalities of fluorescence spectroscopy and imaging, which makes them ideal candidates for our feasibility test. For this purpose, fiber-based spectroscopic measurements of the backscattered laser radiation and the fluorescence signals were carried out in the visible range. RESULTS Experimental studies show the feasibility of the proposed sapphire scalpel to provide a 2-mm-resolution of the tumor margins' detection, along with an ability to distinguish the tumor invasion region, which results from analysis of the backscattered optical fields and the endogenous or exogenous fluorescence data. CONCLUSIONS Our findings justified a strong potential of the sapphire scalpel for surgical oncology. However, further research and engineering efforts are required to optimize the sapphire scalpel geometry and the optical diagnosis protocols to meet the requirements of oncosurgery, including diagnosis and resection of neoplasms with different localizations and nosologies.
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Affiliation(s)
- Irina N Dolganova
- Institute of Solid State Physics of the Russian Academy of Sciences, Chernogolovka, Russia.,Institute for Regenerative Medicine, Sechenov University, Moscow, Russia.,Bauman Moscow State Technical University, Moscow, Russia
| | - Daria A Varvina
- Institute for Regenerative Medicine, Sechenov University, Moscow, Russia.,International School "Medicine of the Future", Sechenov University, Moscow, Russia
| | - Irina A Shikunova
- Institute of Solid State Physics of the Russian Academy of Sciences, Chernogolovka, Russia
| | - Anna I Alekseeva
- Institute for Regenerative Medicine, Sechenov University, Moscow, Russia.,Research Institute of Human Morphology, Moscow, Russia
| | - Pavel A Karalkin
- Institute for Cluster Oncology, Sechenov University, Moscow, Russia.,Hertsen Moscow Oncology Research Institute, National Medical Research Radiological Centre, Moscow, Russia
| | | | - Pavel V Nikitin
- Institute for Regenerative Medicine, Sechenov University, Moscow, Russia
| | - Arsen K Zotov
- Institute of Solid State Physics of the Russian Academy of Sciences, Chernogolovka, Russia.,Bauman Moscow State Technical University, Moscow, Russia.,Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia
| | | | - Gleb M Katyba
- Institute of Solid State Physics of the Russian Academy of Sciences, Chernogolovka, Russia.,Bauman Moscow State Technical University, Moscow, Russia.,Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia
| | - Kirill I Zaytsev
- Institute for Regenerative Medicine, Sechenov University, Moscow, Russia.,Bauman Moscow State Technical University, Moscow, Russia.,Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia
| | - Valery V Tuchin
- Science Medical Center, Saratov State University, Saratov, Russia.,Institute of Precision Mechanics and Control of the Russian Academy of Sciences, Saratov, Russia.,National Research Tomsk University, Tomsk, Russia
| | - Vladimir N Kurlov
- Institute of Solid State Physics of the Russian Academy of Sciences, Chernogolovka, Russia.,Institute for Regenerative Medicine, Sechenov University, Moscow, Russia.,Bauman Moscow State Technical University, Moscow, Russia
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7
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Musina GR, Chernomyrdin NV, Gafarova ER, Gavdush AA, Shpichka AJ, Komandin GA, Anzin VB, Grebenik EA, Kravchik MV, Istranova EV, Dolganova IN, Zaytsev KI, Timashev PS. Moisture adsorption by decellularized bovine pericardium collagen matrices studied by terahertz pulsed spectroscopy and solid immersion microscopy. BIOMEDICAL OPTICS EXPRESS 2021; 12:5368-5386. [PMID: 34692188 PMCID: PMC8515980 DOI: 10.1364/boe.433216] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 07/26/2021] [Accepted: 07/27/2021] [Indexed: 05/03/2023]
Abstract
In this paper, terahertz (THz) pulsed spectroscopy and solid immersion microscopy were applied to study interactions between water vapor and tissue scaffolds-the decellularized bovine pericardium (DBP) collagen matrices, in intact form, cross-linked with the glutaraldehyde or treated by plasma. The water-absorbing properties of biomaterials are prognostic for future cell-mediated reactions of the recipient tissue with the scaffold. Complex dielectric permittivity of DBPs was measured in the 0.4-2.0 THz frequency range, while the samples were first dehydrated and then exposed to water vapor atmosphere with 80.0 ± 5.0% relative humidity. These THz dielectric measurements of DBPs and the results of their weighting allowed to estimate the adsorption time constants, an increase of tissue mass, as well as dispersion of these parameters. During the adsorption process, changes in the DBPs' dielectric permittivity feature an exponential character, with the typical time constant of =8-10 min, the transient process saturation at =30 min, and the tissue mass improvement by =1-3%. No statistically-relevant differences between the measured properties of the intact and treated DBPs were observed. Then, contact angles of wettability were measured for the considered DBPs using a recumbent drop method, while the observed results showed that treatments of DBP somewhat affects their surface energies, polarity, and hydrophilicity. Thus, our studies revealed that glutaraldehyde and plasma treatment overall impact the DBP-water interactions, but the resultant effects appear to be quite complex and comparable to the natural variability of the tissue properties. Such a variability was attributed to the natural heterogeneity of tissues, which was confirmed by the THz microscopy data. Our findings are important for further optimization of the scaffolds' preparation and treatment technologies. They pave the way for THz technology use as a non-invasive diagnosis tool in tissue engineering and regenerative medicine.
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Affiliation(s)
- G R Musina
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Russia
- Bauman Moscow State Technical University, Russia
| | - N V Chernomyrdin
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Russia
- Institute for Regenerative Medicine, Sechenov First Moscow State Medical University (Sechenov University), Russia
- World-Class Research Center "Digital Biodesign & Personalized Healthcare", Sechenov First Moscow State Medical University (Sechenov University), Russia
| | - E R Gafarova
- Institute for Regenerative Medicine, Sechenov First Moscow State Medical University (Sechenov University), Russia
- World-Class Research Center "Digital Biodesign & Personalized Healthcare", Sechenov First Moscow State Medical University (Sechenov University), Russia
| | - A A Gavdush
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Russia
- Bauman Moscow State Technical University, Russia
| | - A J Shpichka
- Institute for Regenerative Medicine, Sechenov First Moscow State Medical University (Sechenov University), Russia
- World-Class Research Center "Digital Biodesign & Personalized Healthcare", Sechenov First Moscow State Medical University (Sechenov University), Russia
- Chemistry Department, Lomonosov Moscow State University, Russia
| | - G A Komandin
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Russia
- Bauman Moscow State Technical University, Russia
| | - V B Anzin
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Russia
| | - E A Grebenik
- Institute for Regenerative Medicine, Sechenov First Moscow State Medical University (Sechenov University), Russia
| | - M V Kravchik
- Scientific Research Institute of Eye Diseases, Russia
| | - E V Istranova
- Institute for Regenerative Medicine, Sechenov First Moscow State Medical University (Sechenov University), Russia
| | - I N Dolganova
- Institute for Regenerative Medicine, Sechenov First Moscow State Medical University (Sechenov University), Russia
- World-Class Research Center "Digital Biodesign & Personalized Healthcare", Sechenov First Moscow State Medical University (Sechenov University), Russia
- Institute of Solid State Physics of the Russian Academy of Sciences, Russia
| | - K I Zaytsev
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Russia
- Bauman Moscow State Technical University, Russia
- Institute for Regenerative Medicine, Sechenov First Moscow State Medical University (Sechenov University), Russia
| | - P S Timashev
- Institute for Regenerative Medicine, Sechenov First Moscow State Medical University (Sechenov University), Russia
- World-Class Research Center "Digital Biodesign & Personalized Healthcare", Sechenov First Moscow State Medical University (Sechenov University), Russia
- Chemistry Department, Lomonosov Moscow State University, Russia
- Department of Polymers and Composites, N. N. Semenov Institute of Chemical Physics, Russia
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8
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Kucheryavenko AS, Chernomyrdin NV, Gavdush AA, Alekseeva AI, Nikitin PV, Dolganova IN, Karalkin PA, Khalansky AS, Spektor IE, Skorobogatiy M, Tuchin VV, Zaytsev KI. Terahertz dielectric spectroscopy and solid immersion microscopy of ex vivo glioma model 101.8: brain tissue heterogeneity. BIOMEDICAL OPTICS EXPRESS 2021; 12:5272-5289. [PMID: 34513256 PMCID: PMC8407834 DOI: 10.1364/boe.432758] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/15/2021] [Accepted: 07/22/2021] [Indexed: 05/23/2023]
Abstract
Terahertz (THz) technology holds strong potential for the intraoperative label-free diagnosis of brain gliomas, aimed at ensuring their gross-total resection. Nevertheless, it is still far from clinical applications due to the limited knowledge about the THz-wave-brain tissue interactions. In this work, rat glioma model 101.8 was studied ex vivo using both the THz pulsed spectroscopy and the 0.15λ-resolution THz solid immersion microscopy (λ is a free-space wavelength). The considered homograft model mimics glioblastoma, possesses heterogeneous character, unclear margins, and microvascularity. Using the THz spectroscopy, effective THz optical properties of brain tissues were studied, as averaged within the diffraction-limited beam spot. Thus measured THz optical properties revealed a persistent difference between intact tissues and a tumor, along with fluctuations of the tissue response over the rat brain. The observed THz microscopic images showed heterogeneous character of brain tissues at the scale posed by the THz wavelengths, which is due to the distinct response of white and gray matters, the presence of different neurovascular structures, as well as due to the necrotic debris and hemorrhage in a tumor. Such heterogeneities might significantly complicate delineation of tumor margins during the intraoperative THz neurodiagnosis. The presented results for the first time pose the problem of studying the inhomogeneity of brain tissues that causes scattering of THz waves, as well as the urgent need to use the radiation transfer theory for describing the THz-wave - tissue interactions.
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Affiliation(s)
- A S Kucheryavenko
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Russia
- Institute of Solid State Physics of the Russian Academy of Sciences, Russia
| | - N V Chernomyrdin
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Russia
- Bauman Moscow State Technical University, Russia
| | - A A Gavdush
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Russia
- Bauman Moscow State Technical University, Russia
| | | | - P V Nikitin
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Russia
- Institute for Regenerative Medicine, Sechenov University, Russia
- Burdenko Neurosurgery Institute, Russia
| | - I N Dolganova
- Institute of Solid State Physics of the Russian Academy of Sciences, Russia
- Bauman Moscow State Technical University, Russia
- Institute for Regenerative Medicine, Sechenov University, Russia
| | - P A Karalkin
- Institute for Cluster Oncology, Sechenov University, Russia
| | | | - I E Spektor
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Russia
| | - M Skorobogatiy
- Department of Engineering Physics, Polytechnique Montreal, Canada
| | - V V Tuchin
- Science Medical Center, Saratov State University, Russia
- Institute of Precision Mechanics and Control of the Russian Academy of Sciences, Russia
- National Research Tomsk State University, Russia
| | - K I Zaytsev
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Russia
- Bauman Moscow State Technical University, Russia
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9
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Gavdush AA, Chernomyrdin NV, Komandin GA, Dolganova IN, Nikitin PV, Musina GR, Katyba GM, Kucheryavenko AS, Reshetov IV, Potapov AA, Tuchin VV, Zaytsev KI. Terahertz dielectric spectroscopy of human brain gliomas and intact tissues ex vivo: double-Debye and double-overdamped-oscillator models of dielectric response. BIOMEDICAL OPTICS EXPRESS 2021; 12:69-83. [PMID: 33659071 PMCID: PMC7899500 DOI: 10.1364/boe.411025] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 11/25/2020] [Accepted: 11/30/2020] [Indexed: 05/07/2023]
Abstract
Terahertz (THz) technology offers novel opportunities in the intraoperative neurodiagnosis. Recently, the significant progress was achieved in the study of brain gliomas and intact tissues, highlighting a potential for THz technology in the intraoperative delineation of tumor margins. However, a lack of physical models describing the THz dielectric permittivity of healthy and pathological brain tissues restrains the further progress in this field. In the present work, the ex vivo THz dielectric response of human brain tissues was analyzed using relaxation models of complex dielectric permittivity. Dielectric response of tissues was parametrized by a pair of the Debye relaxators and a pair of the overdamped-oscillators - namely, the double-Debye (DD) and double-overdamped-oscillator (DO) models. Both models accurately reproduce the experimental curves for the intact tissues and the WHO Grades I-IV gliomas. While the DD model is more common for THz biophotonics, the DO model is more physically rigorous, since it satisfies the sum rule. In this way, the DO model and the sum rule were, then, applied to estimate the content of water in intact tissues and gliomas ex vivo. The observed results agreed well with the earlier-reported data, justifying water as a main endogenous label of brain tumors in the THz range. The developed models can be used to describe completely the THz-wave - human brain tissues interactions in the frameworks of classical electrodynamics, being quite important for further research and developments in THz neurodiagnosis of tumors.
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Affiliation(s)
- A A Gavdush
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia
| | - N V Chernomyrdin
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia
- Institute for Regenerative Medicine, Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - G A Komandin
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia
| | - I N Dolganova
- Institute for Regenerative Medicine, Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
- Institute of Solid State Physics of the Russian Academy of Sciences, Chernogolovka, Russia
| | - P V Nikitin
- P.K. Anokhin Institute of Normal Physiology, Moscow, Russia
| | - G R Musina
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia
| | - G M Katyba
- Institute of Solid State Physics of the Russian Academy of Sciences, Chernogolovka, Russia
| | - A S Kucheryavenko
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia
- Institute of Solid State Physics of the Russian Academy of Sciences, Chernogolovka, Russia
| | - I V Reshetov
- Institute for Cluster Oncology, Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - A A Potapov
- Burdenko Neurosurgery Institute, Moscow, Russia
| | - V V Tuchin
- Saratov State University, Saratov, Russia
- Institute of Precision Mechanics and Control of the Russian Academy of Sciences, Saratov, Russia
- National Research Tomsk State University, Tomsk, Russia
| | - K I Zaytsev
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia
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