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Sdobnov A, Tsytsarev V, Piavchenko G, Bykov A, Meglinski I. Beyond life: Exploring hemodynamic patterns in postmortem mice brains. JOURNAL OF BIOPHOTONICS 2024; 17:e202400017. [PMID: 38714530 DOI: 10.1002/jbio.202400017] [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: 01/18/2024] [Revised: 03/14/2024] [Accepted: 04/09/2024] [Indexed: 05/10/2024]
Abstract
We utilize Laser Speckle Contrast Imaging (LSCI) for visualizing cerebral blood flow in mice during and post-cardiac arrest. Analyzing LSCI images, we noted temporal blood flow variations across the brain surface for hours postmortem. Fast Fourier Transform (FFT) analysis depicted blood flow and microcirculation decay post-death. Continuous Wavelet Transform (CWT) identified potential cerebral hemodynamic synchronization patterns. Additionally, non-negative matrix factorization (NMF) with four components segmented LSCI images, revealing structural subcomponent alterations over time. This integrated approach of LSCI, FFT, CWT, and NMF offers a comprehensive tool for studying cerebral blood flow dynamics, metaphorically capturing the 'end of the tunnel' experience. Results showed primary postmortem hemodynamic activity in the olfactory bulbs, followed by blood microflow relocations between somatosensory and visual cortical regions via the superior sagittal sinus. This method opens new avenues for exploring these phenomena, potentially linking neuroscientific insights with mysteries surrounding consciousness and perception at life's end.
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Affiliation(s)
- Anton Sdobnov
- Optoelectronics and Measurement Techniques, University of Oulu, Oulu, Finland
| | - Vassiliy Tsytsarev
- Department of Neurobiology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Gennadi Piavchenko
- Department of Human Anatomy and Histology, Institute of Clinical Medicine N.V. Sklifosovsky, I.M. Sechenov First Moscow State Medical University, Moscow, Russia
| | - Alexander Bykov
- Optoelectronics and Measurement Techniques, University of Oulu, Oulu, Finland
| | - Igor Meglinski
- Department of Human Anatomy and Histology, Institute of Clinical Medicine N.V. Sklifosovsky, I.M. Sechenov First Moscow State Medical University, Moscow, Russia
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2
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Liu J, Xu H, Gao S, Liu L, Qu J, Ohulchanskyy TY. Combining near infrared fluorescence and laser speckle imaging with optical tissue clearing for in vivo transcranial monitoring of cerebral blood vessels damaged by photodynamic nanoformulation. BIOMEDICAL OPTICS EXPRESS 2024; 15:924-937. [PMID: 38404313 PMCID: PMC10890862 DOI: 10.1364/boe.513820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 01/08/2024] [Accepted: 01/08/2024] [Indexed: 02/27/2024]
Abstract
In vivo near infrared (NIR) fluorescence imaging and laser speckle contrast imaging (LSCI) are emerging optical bioimaging modalities, which can provide information on blood vessels morphology, volume and the blood flow velocity. Optical tissue clearing (OTC) technique addresses a light scattering problem in optical bioimaging, which is imperative for the transcranial brain imaging. Herein, we report an approach combining NIR fluorescence and LSC microscopy imaging with OTC. A liposomal nanoformulation comprising NIR fluorescent dye ICG and photosensitizer BPD was synthesized and injected intravenously into mouse with OTC treated skull. Transcranial excitation of BPD in nanoliposomes resulted in the localized, irradiation dose dependent photodynamic damage of the brain blood vessels, which was manifested both in NIR fluorescence and LSC transcranial imaging, revealing changes in the vessels morphology, volume and the blood flow rate. The developed approach allows for bimodal imaging guided, localized vascular PDT of cancer and other diseases.
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Affiliation(s)
- Jiantao Liu
- Key Laboratory of Optoelectronic Devices
and Systems of Ministry of Education and Guangdong Province, College
of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, Guangdong, China
| | - Hao Xu
- Key Laboratory of Optoelectronic Devices
and Systems of Ministry of Education and Guangdong Province, College
of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, Guangdong, China
| | - Siqi Gao
- Key Laboratory of Optoelectronic Devices
and Systems of Ministry of Education and Guangdong Province, College
of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, Guangdong, China
| | - Liwei Liu
- Key Laboratory of Optoelectronic Devices
and Systems of Ministry of Education and Guangdong Province, College
of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, Guangdong, China
| | - Junle Qu
- Key Laboratory of Optoelectronic Devices
and Systems of Ministry of Education and Guangdong Province, College
of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, Guangdong, China
- Engineering Research Center of Optical
Instrument and System, Ministry of Education, Shanghai Key Lab of
Modern Optical System, School of Optical-Electrical and Computer
Engineering, University of Shanghai for Science and
Technology, Shanghai, China
| | - Tymish Y. Ohulchanskyy
- Key Laboratory of Optoelectronic Devices
and Systems of Ministry of Education and Guangdong Province, College
of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, Guangdong, China
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3
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Park HS, Shim MJ, Kim Y, Ko TY, Choi JH, Ahn YC. Multimodal real-time imaging with laser speckle contrast and fluorescent contrast. Photodiagnosis Photodyn Ther 2024; 45:103912. [PMID: 38043762 DOI: 10.1016/j.pdpdt.2023.103912] [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: 10/18/2023] [Revised: 11/16/2023] [Accepted: 11/28/2023] [Indexed: 12/05/2023]
Abstract
INTRODUCTION Laser speckle contrast imaging (LSCI) can achieve real-time 2D perfusion maps non-invasively. However, LSCI is still difficult to use in general clinical applications because of movement sensitivity and limitations in blood flow analysis. To overcome this, fluorescence imaging (FI) is combined with LSCI using a light source with a wavelength of 785 nm in near-infrared (NIR) region and validates to visualize real-time blood perfusion. MATERIALS AND METHODS The system was performed using Intralipid and indocyanine green (ICG) in a flow phantom that has three tubes and controlled the flow rate in 0-150 μl/min range. First, real-time LSCI was monitored and measured the change in speckle contrast by reperfusion. Then, we visualized blood perfusion of a rabbit ear under the non-invasive condition by intravenous injection using a total of five different ICG concentration solutions from 128 μM to 3.22 mM. RESULTS The combined system achieved the performance of processing laser speckle images at about 37-38 fps, and we simultaneously confirmed the fluorescence of ICG and changes in speckle contrast due to intralipid as a light scatterer. In addition, we obtained real-time contrast variation and fluorescent images occurring in rabbit's blood perfusion. CONCLUSIONS The aim of this study is to provide a real-time diagnostic imaging system that can be used in general clinical applications. LSCI and FI are combined complementary for observing tissue perfusion using a single NIR light source. The combined system could achieve real-time visualization of blood perfusion non-invasively.
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Affiliation(s)
- Hyun-Seo Park
- Industry 4.0 Convergence Bionics Engineering, Pukyong National University, Busan 48513, South Korea
| | - Min-Jae Shim
- Department of Biomedical Engineering, Pukyong National University, Busan 48513, South Korea
| | - Yikeun Kim
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, South Korea
| | - Taek-Yong Ko
- Kosin University Gospel Hospital, Busan 49267, South Korea
| | - Jin-Hyuk Choi
- Kosin University Gospel Hospital, Busan 49267, South Korea
| | - Yeh-Chan Ahn
- Industry 4.0 Convergence Bionics Engineering, Pukyong National University, Busan 48513, South Korea; Department of Biomedical Engineering, Pukyong National University, Busan 48513, South Korea.
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Semyachkina-Glushkovskaya O, Fedosov I, Zaikin A, Ageev V, Ilyukov E, Myagkov D, Tuktarov D, Blokhina I, Shirokov A, Terskov A, Zlatogorskaya D, Adushkina V, Evsukova A, Dubrovsky A, Tsoy M, Telnova V, Manzhaeva M, Dmitrenko A, Krupnova V, Kurths J. Technology of the photobiostimulation of the brain's drainage system during sleep for improvement of learning and memory in male mice. BIOMEDICAL OPTICS EXPRESS 2024; 15:44-58. [PMID: 38223185 PMCID: PMC10783921 DOI: 10.1364/boe.505618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 11/17/2023] [Accepted: 11/20/2023] [Indexed: 01/16/2024]
Abstract
In this study on healthy male mice using confocal imaging of dye spreading in the brain and its further accumulation in the peripheral lymphatics, we demonstrate stronger effects of photobiomodulation (PBM) on the brain's drainage system in sleeping vs. awake animals. Using the Pavlovian instrumental transfer probe and the 2-objects-location test, we found that the 10-day course of PBM during sleep vs. wakefulness promotes improved learning and spatial memory in mice. For the first time, we present the technology for PBM under electroencephalographic (EEG) control that incorporates modern state of the art facilities of optoelectronics and biopotential detection and that can be built of relatively cheap and commercially available components. These findings open a new niche in the development of smart technologies for phototherapy of brain diseases during sleep.
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Affiliation(s)
- Oxana Semyachkina-Glushkovskaya
- Department of Biology, Saratov State University, Astrakhanskaya Str. 83, 410012 Saratov, Russia
- Physics Department, Humboldt University, Newtonstrasse 15, 12489 Berlin, Germany
| | - Ivan Fedosov
- Institute of Physics, Saratov State University Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Alexey Zaikin
- Department of Mathematics and Institute for Women's Health, University College London, 25 Gordon Street, London, WC1H 0AY, UK
- Centre for Analysis of Complex Systems, Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya 2, building 4, 119435 Moscow, Russia
- Institute for Cognitive Neuroscience, University Higher School of Economics, Moscow, Russia
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, China
| | - Vasily Ageev
- Institute of Physics, Saratov State University Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Egor Ilyukov
- Institute of Physics, Saratov State University Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Dmitry Myagkov
- Institute of Physics, Saratov State University Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Dmitry Tuktarov
- Institute of Physics, Saratov State University Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Inna Blokhina
- Department of Biology, Saratov State University, Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Alexander Shirokov
- Department of Biology, Saratov State University, Astrakhanskaya Str. 83, 410012 Saratov, Russia
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Prospekt Entuziastov 13, Saratov 410049, Russia
| | - Andrey Terskov
- Department of Biology, Saratov State University, Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Daria Zlatogorskaya
- Department of Biology, Saratov State University, Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Viktoria Adushkina
- Department of Biology, Saratov State University, Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Arina Evsukova
- Department of Biology, Saratov State University, Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Alexander Dubrovsky
- Institute of Physics, Saratov State University Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Maria Tsoy
- Institute of Physics, Saratov State University Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Valeria Telnova
- Department of Biology, Saratov State University, Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Maria Manzhaeva
- Department of Biology, Saratov State University, Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Alexander Dmitrenko
- Department of Biology, Saratov State University, Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Valeria Krupnova
- Department of Biology, Saratov State University, Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Jürgen Kurths
- Department of Biology, Saratov State University, Astrakhanskaya Str. 83, 410012 Saratov, Russia
- Physics Department, Humboldt University, Newtonstrasse 15, 12489 Berlin, Germany
- Centre for Analysis of Complex Systems, Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya 2, building 4, 119435 Moscow, Russia
- Potsdam Institute for Climate Impact Research, Telegrafenberg A31, 14473 Potsdam, Germany
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Mahler S, Huang YX, Liang M, Avalos A, Tyszka JM, Mertz J, Yang C. Assessing depth sensitivity in laser interferometry speckle visibility spectroscopy (iSVS) through source-to-detector distance variation and cerebral blood flow monitoring in humans and rabbits. BIOMEDICAL OPTICS EXPRESS 2023; 14:4964-4978. [PMID: 37791277 PMCID: PMC10545208 DOI: 10.1364/boe.498815] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 08/16/2023] [Accepted: 08/17/2023] [Indexed: 10/05/2023]
Abstract
Recently, speckle visibility spectroscopy (SVS) was non-invasively applied on the head to monitor cerebral blood flow. The technique, using a multi-pixel detecting device (e.g., camera), allows the detection of a larger number of speckles, increasing the proportion of light that is detected. Due to this increase, it is possible to collect light that has propagated deeper through the brain. As a direct consequence, cerebral blood flow can be monitored. However, isolating the cerebral blood flow from the other layers, such as the scalp or skull components, remains challenging. In this paper, we report our investigations on the depth-sensitivity of laser interferometry speckle visibility spectroscopy (iSVS). Specifically, we varied the depth of penetration of the laser light into the head by tuning the source-to-detector distance, and identified the transition point at which cerebral blood flow in humans and rabbits starts to be detected.
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Affiliation(s)
- Simon Mahler
- Department of Electrical Engineering, California Institute of Technology, Pasadena, California 91125, USA
| | - Yu Xi Huang
- Department of Electrical Engineering, California Institute of Technology, Pasadena, California 91125, USA
| | - Mingshu Liang
- Department of Electrical Engineering, California Institute of Technology, Pasadena, California 91125, USA
| | - Alan Avalos
- Office of Laboratory Animal Resources (OLAR), California Institute of Technology, Pasadena, California 91125, USA
| | - Julian M. Tyszka
- Division of Humanities and Social Sciences, California Institute of Technology, Pasadena, California 91125, USA
| | - Jerome Mertz
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts 02215, USA
- Neurophotonics Center, Boston University, Boston, Massachusetts 02215, USA
| | - Changhuei Yang
- Department of Electrical Engineering, California Institute of Technology, Pasadena, California 91125, USA
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6
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Linkous C, Pagan AD, Shope C, Andrews L, Snyder A, Ye T, Valdebran M. Applications of Laser Speckle Contrast Imaging Technology in Dermatology. JID INNOVATIONS 2023; 3:100187. [PMID: 37564105 PMCID: PMC10410171 DOI: 10.1016/j.xjidi.2023.100187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 12/22/2022] [Accepted: 12/27/2022] [Indexed: 01/26/2023] Open
Abstract
Laser speckle contrast imaging or laser speckle imaging (LSI) is a noninvasive imaging technology that can detect areas of dynamic perfusion or vascular flow. Thus, LSI has shown increasing diagnostic utility in various pathologies and has been employed for intraoperative, postoperative, and long-term monitoring in many medical specialties. Recently, LSI has gained traction in clinical dermatology because it can be effective in the assessment of pathologies that are associated with increased perfusion and hypervascularity compared with that of normal tissue. To date, LSI has been found to be highly accurate in monitoring skin graft reperfusion, determining the severity of burns, evaluating neurosurgical revascularization, assessing persistent perfusion in capillary malformations after laser therapy, and differentiating malignant and benign skin lesions. LSI affords the advantage of noninvasively assessing lesions before more invasive methods of diagnosis, such as tissue biopsy, while remaining inexpensive and exhibiting no adverse events to date. However, potential obstacles to its clinical use include tissue movement artifact, primarily qualitative data, and unclear impact on clinical practice given the lack of superiority data compared with the current standard-of-care diagnostic methods. In this review, we discuss the clinical applications of LSI in dermatology for use in the diagnosis and monitoring of vascular, neoplastic, and inflammatory skin conditions.
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Affiliation(s)
- Courtney Linkous
- College of Medicine, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Angel D. Pagan
- School of Medicine, Ponce Health Sciences University, Ponce, Puerto Rico, USA
| | - Chelsea Shope
- College of Medicine, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Laura Andrews
- College of Medicine, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Alan Snyder
- Department of Dermatology & Dermatologic Surgery, College of Medicine, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Tong Ye
- Department of Bioengineering, Clemson University, Clemson, South Carolina, USA
- Department of Regenerative Medicine & Cell Biology, College of Medicine, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Manuel Valdebran
- Department of Dermatology & Dermatologic Surgery, College of Medicine, Medical University of South Carolina, Charleston, South Carolina, USA
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7
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Wang Y, Tsytsarev V, Liao LD. In vivo laser speckle contrast imaging of 4-aminopyridine- or pentylenetetrazole-induced seizures. APL Bioeng 2023; 7:036119. [PMID: 37781728 PMCID: PMC10541235 DOI: 10.1063/5.0158791] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 08/28/2023] [Indexed: 10/03/2023] Open
Abstract
Clinical and preclinical studies on epileptic seizures are closely linked to the study of neurovascular coupling. Obtaining reliable information about cerebral blood flow (CBF) in the area of epileptic activity through minimally invasive techniques is crucial for research in this field. In our studies, we used laser speckle contrast imaging (LSCI) to gather information about the local blood circulation in the area of epileptic activity. We used two models of epileptic seizures: one based on 4-aminopyridine (4-AP) and another based on pentylenetetrazole (PTZ). We verified the duration of an epileptic seizure using electrocorticography (ECoG). We applied the antiepileptic drug topiramate (TPM) to both models, but its effect was different in each case. However, in both models, TPM had an effect on neurovascular coupling in the area of epileptic activity, as shown by both LSCI and ECoG data. We demonstrated that TPM significantly reduced the amplitude of 4-AP-induced epileptic seizures (4-AP+TPM: 0.61 ± 0.13 mV vs 4-AP: 1.08 ± 0.19 mV; p < 0.05), and it also reduced gamma power in ECoG in PTZ-induced epileptic seizures (PTZ+TPM: 38.5% ± 11.9% of the peak value vs PTZ: 59.2% ± 3.0% of peak value; p < 0.05). We also captured the pattern of CBF changes during focal epileptic seizures induced by 4-AP. Our data confirm that the system of simultaneous cortical LSCI and registration of ECoG makes it possible to evaluate the effectiveness of pharmacological agents in various types of epileptic seizures in in vivo models and provides spatial and temporal information on the process of ictogenesis.
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Affiliation(s)
| | - Vassiliy Tsytsarev
- Department of Anatomy and Neurobiology, University of Maryland School of Medicine, 20 Penn Street, HSF-2, Baltimore, Maryland 21201, USA
| | - Lun-De Liao
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, No. 35, Keyan Rd., Zhunan Township, Miaoli County 350, Taiwan
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Li D, Deng L, Hu Z, Li Y, Yu T, Zhong X, Zhu J, Zhu D. Optical clearing imaging assisted evaluation of urokinase thrombolytic therapy on cerebral vessels with different sizes. BIOMEDICAL OPTICS EXPRESS 2022; 13:3243-3258. [PMID: 35781944 PMCID: PMC9208601 DOI: 10.1364/boe.457912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 04/25/2022] [Accepted: 04/26/2022] [Indexed: 06/15/2023]
Abstract
Ischemic stroke is caused by occlusion of the blood vessels in the brain, where intravenous thrombolytic therapy is the most effective treatment. Urokinase is a commonly used drug for intravenous thrombolytic therapy, while the effect of vessel size has not been thoroughly studied on urokinase. In this work, using the thrombin-combined photothrombosis model and craniotomy-free skull optical clearing window, we studied the recanalization of different cortical vessels after urokinase treatment. The results demonstrated that, compared to small vessels in distal middle cerebral artery (MCA) and large MCA, urokinase has the best therapeutic effect on secondary branches of MCA. This study holds potential to provide references for the clinical applications of urokinase.
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Affiliation(s)
- Dongyu Li
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- MoE Key Laboratory for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- Optics Valley Laboratory, Hubei 430074, China
| | - Lu Deng
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- MoE Key Laboratory for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- Optics Valley Laboratory, Hubei 430074, China
| | - Zhengwu Hu
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- MoE Key Laboratory for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- Optics Valley Laboratory, Hubei 430074, China
| | - Yusha Li
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- MoE Key Laboratory for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- Optics Valley Laboratory, Hubei 430074, China
| | - Tingting Yu
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- MoE Key Laboratory for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- Optics Valley Laboratory, Hubei 430074, China
| | - Xiang Zhong
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- MoE Key Laboratory for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- Optics Valley Laboratory, Hubei 430074, China
| | - Jingtan Zhu
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- MoE Key Laboratory for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- Optics Valley Laboratory, Hubei 430074, China
| | - Dan Zhu
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- MoE Key Laboratory for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- Optics Valley Laboratory, Hubei 430074, China
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9
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Piavchenko G, Kozlov I, Dremin V, Stavtsev D, Seryogina E, Kandurova K, Shupletsov V, Lapin K, Alekseyev A, Kuznetsov S, Bykov A, Dunaev A, Meglinski I. Impairments of cerebral blood flow microcirculation in rats brought on by cardiac cessation and respiratory arrest. JOURNAL OF BIOPHOTONICS 2021; 14:e202100216. [PMID: 34534405 DOI: 10.1002/jbio.202100216] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 09/06/2021] [Accepted: 09/09/2021] [Indexed: 05/21/2023]
Abstract
The impairments of cerebral blood flow microcirculation brought on by cardiac and respiratory arrest were assessed with multi-modal diagnostic facilities, utilising laser speckle contrast imaging, fluorescence spectroscopy and diffuse reflectance spectroscopy. The results of laser speckle contrast imaging show a notable reduction of cerebral blood flow in small and medium size vessels during a few minutes of respiratory arrest, while the same effect was observed in large sinuses and their branches during the circulatory cessation. Concurrently, the redox ratio assessed with fluorescence spectroscopy indicates progressing hypoxia, NADH accumulation and increase of FAD consumption. The results of diffuse reflectance spectra measurements display a more rapid grow of the perfusion of deoxygenated blood in case of circulatory impairment. In addition, consequent histopathological analysis performed by using new tissue staining procedure developed in-house. It shows notably higher reduction of size of the neurons due to their wrinkling within brain tissues influenced by circulation impair. Whereas, the brain tissues altered with the respiratory arrest demonstrate focal perivascular oedema and mild hypoxic changes of neuronal morphology. Thus, the study suggests that consequences of a cessation of cerebral blood flow become more dramatic and dangerous compare to respiratory arrest.
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Affiliation(s)
- Gennadii Piavchenko
- Department of Histology, Cytology and Embryology, I.M. Sechenov First Moscow State Medical University, Moscow, Russia
- V.A. Negovsky Scientific Research Institute of General Reanimatology, Federal Research and Clinical Centre of Intensive Care Medicine and Rehabilitology, Moscow, Russia
- Cell Physiology and Pathology Laboratory, Orel State University, Orel, Russia
| | - Igor Kozlov
- R&D Center of Biomedical Photonics, Orel State University, Orel, Russia
| | - Viktor Dremin
- Cell Physiology and Pathology Laboratory, Orel State University, Orel, Russia
- R&D Center of Biomedical Photonics, Orel State University, Orel, Russia
- College of Engineering and Physical Sciences, Aston University, Birmingham, UK
| | - Dmitry Stavtsev
- R&D Center of Biomedical Photonics, Orel State University, Orel, Russia
- Institute of Biomedical Systems, National Research University of Electronic Technology (MIET), Zelenograd, Russia
| | - Evgeniya Seryogina
- Cell Physiology and Pathology Laboratory, Orel State University, Orel, Russia
| | - Ksenia Kandurova
- R&D Center of Biomedical Photonics, Orel State University, Orel, Russia
| | - Valery Shupletsov
- R&D Center of Biomedical Photonics, Orel State University, Orel, Russia
| | - Konstantin Lapin
- V.A. Negovsky Scientific Research Institute of General Reanimatology, Federal Research and Clinical Centre of Intensive Care Medicine and Rehabilitology, Moscow, Russia
| | - Alexander Alekseyev
- Cell Physiology and Pathology Laboratory, Orel State University, Orel, Russia
| | - Sergey Kuznetsov
- Department of Histology, Cytology and Embryology, I.M. Sechenov First Moscow State Medical University, Moscow, Russia
| | - Alexander Bykov
- Opto-Electronics and Measurement Techniques, Faculty of Information and Electrical Engineering, University of Oulu, Oulu, Finland
| | - Andrey Dunaev
- Cell Physiology and Pathology Laboratory, Orel State University, Orel, Russia
- R&D Center of Biomedical Photonics, Orel State University, Orel, Russia
| | - Igor Meglinski
- Department of Histology, Cytology and Embryology, I.M. Sechenov First Moscow State Medical University, Moscow, Russia
- V.A. Negovsky Scientific Research Institute of General Reanimatology, Federal Research and Clinical Centre of Intensive Care Medicine and Rehabilitology, Moscow, Russia
- Opto-Electronics and Measurement Techniques, Faculty of Information and Electrical Engineering, University of Oulu, Oulu, Finland
- Immanuel Kant Baltic Federal University, Kaliningrad, Russia
- College of Engineering and Physical Sciences, Aston University, Birmingham, UK
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10
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Morales-Vargas E, Peregrina-Barreto H, Ramirez-San-Juan JC. Adaptive processing for noise attenuation in laser speckle contrast imaging. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2021; 212:106486. [PMID: 34736164 DOI: 10.1016/j.cmpb.2021.106486] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 10/17/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND AND OBJECTIVE Blood vessel visualization is an essential task to treat and evaluate diseases such as port-wine stain. Laser Speckle Contrast Imaging (LSCI) have applications in the analysis of the microvasculature. However, it is often limited to superficial depths because the tissue among skin and microvasculature introduces noise in the image. To analyze microvasculature, traditional LSCI methods compute a Contrast Image (CI) by using a shifting window of fixed size and shape, which is inadequate in images with structures different types of morphologies in it, as happens in LSCI. This work aims to reduce the noise in the CIs to improve the visualization of blood vessels at high depths (> 300 μ m). METHODS The proposed method processes the CIs with analysis windows that change their size and shape for each pixel to compute the contrast representation with pixels more representatives to the region. RESULTS We performed experiments varying the depth of the blood vessels, the number of frames required to compute the representation, and the blood flow in the blood vessel. We looked for an improvement in the Contrast to Noise Ratio (CNR) in the periphery of the blood vessels using an analysis of variance. Finding that the adaptive processing of the contrast images allows a significant noise attenuation, translated into a better visualization of blood vessels. An average CNR of 2.62 ± 1 and 5.26 ± 1.7 was reached for in-vitro and in-vivo tests respectively, which is higher in comparison with traditional LSCI approaches. CONCLUSIONS The results, backed by the measured CNR, obtained a noise reduction in the CIs, this means a better temporal and spatial resolution. The proposed awK method can obtain an image with better quality than the state-of-the-art methods using fewer frames.
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Affiliation(s)
- E Morales-Vargas
- Instituto Nacional de Astrofísica, Óptica y Electrónica, Luis Enrique Erro 1, Santa Maria Tonantzintla, 72840 Puebla, México
| | - H Peregrina-Barreto
- Instituto Nacional de Astrofísica, Óptica y Electrónica, Luis Enrique Erro 1, Santa Maria Tonantzintla, 72840 Puebla, México.
| | - J C Ramirez-San-Juan
- Instituto Nacional de Astrofísica, Óptica y Electrónica, Luis Enrique Erro 1, Santa Maria Tonantzintla, 72840 Puebla, México
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11
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Molodij G, Sdobnov A, Kuznetsov Y, Harmelin A, Meglinski I, Kalchenko V. Time-space Fourier κω' filter for motion artifacts compensation during transcranial fluorescence brain imaging. Phys Med Biol 2020; 65:075007. [PMID: 32053802 DOI: 10.1088/1361-6560/ab7631] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Intravital imaging of brain vasculature through the intact cranium in vivo is based on the evolution of the fluorescence intensity and provides an ability to characterize various physiological processes in the natural context of cellular resolution. The involuntary motions of the examined subjects often limit in vivo non-invasive functional optical imaging. Conventional imaging diagnostic modalities encounter serious difficulties in correction of artificial motions, associated with fast high dynamics of the intensity values in the collected image sequences, when a common reference cannot be provided. In the current report, we introduce an alternative solution based on a time-space Fourier transform method so-called K-Omega. We demonstrate that the proposed approach is effective for image stabilization of fast dynamic image sequences and can be used autonomously without supervision and assignation of a reference image.
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Affiliation(s)
- Guillaume Molodij
- Department of Veterinary Resources, Weizmann Institute of Science, Rehovot 76100, Israel
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12
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A Robust Method for Adjustment of Laser Speckle Contrast Imaging during Transcranial Mouse Brain Visualization. PHOTONICS 2019. [DOI: 10.3390/photonics6030080] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Laser speckle imaging (LSI) is a well-known and useful approach for the non-invasive visualization of flows and microcirculation localized in turbid scattering media, including biological tissues (such as brain vasculature, skin capillaries etc.). Despite an extensive use of LSI for brain imaging, the LSI technique has several critical limitations. One of them is associated with inability to resolve a functionality of vessels. This limitation also leads to the systematic error in the quantitative interpretation of values of speckle contrast obtained for different vessel types, such as sagittal sinus, arteries, and veins. Here, utilizing a combined use of LSI and fluorescent intravital microscopy (FIM), we present a simple and robust method to overcome the limitations mentioned above for the LSI approach. The proposed technique provides more relevant, abundant, and valuable information regarding perfusion rate ration between different types of vessels that makes this method highly useful for in vivo brain surgical operations.
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