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Fu C, Wang D, Wang L, Zhu L, Li Z, Chen T, Feng H, Li F. Diffuse optical detection of global cerebral ischemia in an adult porcine model. JOURNAL OF BIOPHOTONICS 2023; 16:e202200168. [PMID: 36397661 DOI: 10.1002/jbio.202200168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Revised: 11/13/2022] [Accepted: 11/14/2022] [Indexed: 06/16/2023]
Abstract
Rapid screening for ischemic strokes in prehospital settings may improve patient outcomes by allowing early deployment of vascular recanalization therapies. However, there are no low-cost and convenient methods that can assess ischemic strokes in such a setting. Diffuse correlation spectroscopy (DCS) is a promising method for continuous, noninvasive transcranial monitoring of cerebral blood flow. In this study, we used a DCS system to detect cerebral hemodynamics before and after acute ischemic stroke in pigs. Seven adult porcines were chosen to establish ischemic stroke models via bilateral common carotid artery ligation (n = 5) or air emboli (n = 2). The results showed a significant difference in blood flow index (BFI) between the normal and ischemic groups. Relative blood flow index (rBFI) exhibited excellent results. Therefore, the diffuse optical method can assess the hemodynamic changes in acute cerebral ischemic stroke onset in pigs, and rBFI may be a promising biomarker for identifying cerebral ischemic stroke.
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Affiliation(s)
- Chuhua Fu
- Department of Neurosurgery of Southwest Hospital, Army Medical University, Chong Qing, People's Republic of China
- Department of Neurosurgery, Xiangyang No.1 People's Hospital, Hubei University of Medicine, Xiangyang, People's Republic of China
| | - Detian Wang
- Department of Neurosurgery of Southwest Hospital, Army Medical University, Chong Qing, People's Republic of China
- Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang, Sichuan, People's Republic of China
| | - Long Wang
- Department of Neurosurgery of Southwest Hospital, Army Medical University, Chong Qing, People's Republic of China
| | - Liguo Zhu
- Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang, Sichuan, People's Republic of China
| | - Zeren Li
- Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang, Sichuan, People's Republic of China
| | - Tunan Chen
- Department of Neurosurgery of Southwest Hospital, Army Medical University, Chong Qing, People's Republic of China
| | - Hua Feng
- Department of Neurosurgery of Southwest Hospital, Army Medical University, Chong Qing, People's Republic of China
| | - Fei Li
- Department of Neurosurgery of Southwest Hospital, Army Medical University, Chong Qing, People's Republic of China
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Lin BS, Wang CC, Chang MH, Chio CC. Evaluation of traumatic brain injury by optical technique. BMC Neurol 2015; 15:202. [PMID: 26467307 PMCID: PMC4606549 DOI: 10.1186/s12883-015-0465-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Accepted: 10/06/2015] [Indexed: 12/27/2022] Open
Abstract
Background Traumatic brain injury (TBI), usually due to brain shaking or impact, affects the normal brain function and may lead to severe disability or even death. However, there is paucity of information regarding changes in the physiologic state of humans or animals after brain shaking. Methods In this study, near-infrared spectroscopy (NIRS) was used to continuously monitor the concentration change of oxy-hemoglobin (HbO2) and deoxy-hemoglobin (HbR) to understand changes in the physiological state during and after brain shaking. Laser Doppler flowmetry was also used to monitor changes in cerebral blood flow under TBI to supplement the investigation. Triphenyltetrazolium chloride (TTC) staining was used to monitor changes of infarction volume corresponding to different impact strengths. Result The experimental results indicated that concentration changes of HbO2 and total-hemoglobin (HbT) were significantly related to the impact strength. The infarction volume was also significantly related to the impact strength. Conclusion Therefore, the non-invasive monitoring of concentration changes in HbO2, HbR, and HbT using NIRS may have a clinical application for the evaluation of TBI.
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Affiliation(s)
- Bor-Shyh Lin
- Institute of Imaging and Biomedical Photonics, National Chiao-Tung University, Tainan, Taiwan. .,Department of Medical Research, Chi Mei Medical Center, Tainan, Taiwan.
| | - Che-Chuan Wang
- Institute of Photonic System, National Chiao-Tung University, No.901, Zhonghua Rd., Yongkang Dist., Tainan, 710, Taiwan. .,Division of Neurosurgery, Department of Surgery, Chi Mei Medical Center, Tainan, Taiwan. .,Department of Child Care, Southern Taiwan University of Science and Technology, Tainan, Taiwan.
| | - Ming-Hsien Chang
- Institute of Imaging and Biomedical Photonics, National Chiao-Tung University, Tainan, Taiwan.
| | - Chung-Ching Chio
- Division of Neurosurgery, Department of Surgery, Chi Mei Medical Center, Tainan, Taiwan.
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Abstract
Peripheral haemodynamics refers to blood flow, which determines oxygen and nutrient delivery to the tissues. Peripheral blood flow is affected by vascular resistance and blood pressure, which in turn varies with cardiac function. Arterial oxygen content depends on the blood haemoglobin concentration (Hb) and arterial pO2; tissue oxygen delivery depends on the position of the oxygen-dissociation curve, which is determined by temperature and the amount of adult or fetal haemoglobin. Methods available to study tissue perfusion include near-infrared spectroscopy, Doppler flowmetry, orthogonal polarisation spectral imaging and the peripheral perfusion index. Cardiac function, blood gases, Hb, and peripheral temperature all affect blood flow and oxygen extraction. Blood pressure appears to be less important. Other factors likely to play a role are the administration of vasoactive medications and ventilation strategies, which affect blood gases and cardiac output by changing the intrathoracic pressure.
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Abstract
The purpose of this review is to provide an overview of the methods available for imaging tissue oxygenation. The following imaging methods are reviewed: phosphorescence, near-infrared (NIR), positron emission tomography (PET), magnetic resonance imaging ((19)F MRI and BOLD MRI), and electron paramagnetic resonance (EPR). The methods are based on different principles and differ in their ability to accurately quantify tissue oxygenation, either the absolute value of a particular measure of oxygenation (partial pressure of oxygen, concentration), or a parameter related to it (oxygen saturation). Methods that can provide images of relative changes in oxygenation or visualization of hypoxia in a specific tissue of interest are also considered valuable tools for biomedical research and clinical applications.
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Affiliation(s)
- Deepti S Vikram
- Center for Biomedical EPR Spectroscopy and Imaging, Comprehensive Cancer Center, Davis Heart and Lung Research Institute, Department of Internal Medicine, The Ohio State University, Columbus, Ohio 43210, USA
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Abstract
The strong and steady development of diffuse optical spectroscopy and tomography as new biomedical optics technologies promises to bring these optical techniques into clinical practice. This article provides a brief review of the light-tissue interaction, the instrumentation, and the theory relevant to this field. This is followed by a survey of the three main applications: brain imaging, muscle imaging, and breast imaging. Lastly, the future outlook of the technology is presented, highlighting the new promises based on recent breakthroughs.
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Affiliation(s)
- Xavier Intes
- Biomedical Optical Imaging, Advanced Research Technologies (ART), 2300 Alfred-Nobel Boulevard, Saint-Laurent, Quebec H4S 2A4, Canada.
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Jameson DM, Croney JC, Moens PDJ. Fluorescence: basic concepts, practical aspects, and some anecdotes. Methods Enzymol 2003; 360:1-43. [PMID: 12622145 DOI: 10.1016/s0076-6879(03)60105-9] [Citation(s) in RCA: 100] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
We hope that we have conveyed information of interest and value to present and future fluorescence practitioners. Those readers with a sustaining interest in this topic may wish to consult more comprehensive sources such as Molecular Fluorescence: Principles and Applications, an excellent text by Valeur, or Principles of Fluorescence Spectroscopy by Lakowicz. Many specialized fluorescence topics are covered in the series Topics in Fluorescence Spectroscopy (Volumes 1-6), and several volumes of Methods in Enzymology (e.g., Volumes 246 and 278) have dealt with issues in fluorescence spectroscopy. Proceedings from the International Conference on Methods and Applications of Fluorescence Spectroscopy, 1997 (MAFS 97) and MAFS 98 (in press) also present fluorescence work on many different topics in biological and chemical fields. The Molecular Probes Handbook and web site (www.probes.com) are also rich sources of useful information. Finally, any reader with a question or seeking advice on some topic related to fluorescence is welcome to e-mail D.M.J. at djameson@hawaii.edu.
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Affiliation(s)
- David M Jameson
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu 96822, USA.
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Abstract
This article reviews diffuse optical brain imaging, a technique that employs near-infrared light to non-invasively probe the brain for changes in parameters relating to brain function. We describe the general methodology, including types of measurements and instrumentation (including the tradeoffs inherent in the various instrument components), and the basic theory required to interpret the recorded data. A brief review of diffuse optical applications is included, with an emphasis on research that has been done with psychiatric populations. Finally, we discuss some practical issues and limitations that are relevant when conducting diffuse optical experiments. We find that, while diffuse optics can provide substantial advantages to the psychiatric researcher relative to the alternative brain imaging methods, the method remains substantially underutilized in this field.
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Affiliation(s)
- Gary Strangman
- Neural Systems Group, Massachusetts General Hospital, Harvard Medical School and Harvard-MIT Division of Health Sciences and Technology, Charlestown, MA 02129, USA
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Zhang G, Katz A, Alfano RR, Kofinas AD, Kofinas DA, Stubblefield PG, Rosenfeld W, Beyer D, Maulik D, Stankovic MR. Brain perfusion monitoring with frequency-domain and continuous-wave near-infrared spectroscopy: a cross-correlation study in newborn piglets. Phys Med Biol 2000; 45:3143-58. [PMID: 11098895 DOI: 10.1088/0031-9155/45/11/303] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The newborn piglet brain model was used to correlate continuous-wave (CW) and frequency-domain (FD) near-infrared spectroscopy. Six ventilated and instrumented newborn piglets were subjected to a series of manipulations in blood oxygenation with the effects on brain perfusion known to be associated with brain hypoxia-ischaemia. An excellent agreement between the CW and FD was demonstrated. This agreement improved when the scattering properties (determined by the FD device) were employed to calculate the differential pathlength factor, an important step in CW data processing.
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Affiliation(s)
- G Zhang
- Institute for Ultrafast Spectroscopy and Lasers and New York State Center for Advanced Technology for Ultrafast Photonic Materials and Applications Department of Electrical Engineering and Physics, The City College of the City Uni
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