1
|
Stein KY, Gomez A, Griesdale D, Sekhon M, Bernard F, Gallagher C, Thelin EP, Raj R, Aries M, Froese L, Kramer A, Zeiler FA. Cerebral physiologic insult burden in acute traumatic neural injury: a Canadian High Resolution-TBI (CAHR-TBI) descriptive analysis. Crit Care 2024; 28:294. [PMID: 39232842 PMCID: PMC11373089 DOI: 10.1186/s13054-024-05083-y] [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: 07/09/2024] [Accepted: 08/29/2024] [Indexed: 09/06/2024] Open
Abstract
BACKGROUND Over the recent decades, continuous multi-modal monitoring of cerebral physiology has gained increasing interest for its potential to help minimize secondary brain injury following moderate-to-severe acute traumatic neural injury (also termed traumatic brain injury; TBI). Despite this heightened interest, there has yet to be a comprehensive evaluation of the effects of derangements in multimodal cerebral physiology on global cerebral physiologic insult burden. In this study, we offer a multi-center descriptive analysis of the associations between deranged cerebral physiology and cerebral physiologic insult burden. METHODS Using data from the Canadian High-Resolution TBI (CAHR-TBI) Research Collaborative, a total of 369 complete patient datasets were acquired for the purposes of this study. For various cerebral physiologic metrics, patients were trichotomized into low, intermediate, and high cohorts based on mean values. Jonckheere-Terpstra testing was then used to assess for directional relationships between these cerebral physiologic metrics and various measures of cerebral physiologic insult burden. Contour plots were then created to illustrate the impact of preserved vs impaired cerebrovascular reactivity on these relationships. RESULTS It was found that elevated intracranial pressure (ICP) was associated with more time spent with cerebral perfusion pressure (CPP) < 60 mmHg and more time with impaired cerebrovascular reactivity. Low CPP was associated with more time spent with ICP > 20 or 22 mmHg and more time spent with impaired cerebrovascular reactivity. Elevated cerebrovascular reactivity indices were associated with more time spent with CPP < 60 mmHg as well as ICP > 20 or 22 mmHg. Low brain tissue oxygenation (PbtO2) only demonstrated a significant association with more time spent with CPP < 60 mmHg. Low regional oxygen saturation (rSO2) failed to produce a statistically significant association with any particular measure of cerebral physiologic insult burden. CONCLUSIONS Mean ICP, CPP and, cerebrovascular reactivity values demonstrate statistically significant associations with global cerebral physiologic insult burden; however, it is uncertain whether measures of oxygen delivery provide any significant insight into such insult burden.
Collapse
Affiliation(s)
- Kevin Y Stein
- Department of Biomedical Engineering, Price Faculty of Engineering, University of Manitoba, Winnipeg, MB, Canada.
- Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada.
| | - Alwyn Gomez
- Department of Human Anatomy and Cell Science, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
- Section of Neurosurgery, Department of Surgery, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Donald Griesdale
- Department of Anesthesiology, Pharmacology, and Therapeutics, University of British Columbia, Vancouver, BC, Canada
| | - Mypinder Sekhon
- Department of Anesthesiology, Pharmacology, and Therapeutics, University of British Columbia, Vancouver, BC, Canada
- Division of Critical Care, Department of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Francis Bernard
- Section of Critical Care, Department of Medicine, University of Montreal, Montreal, QC, Canada
| | - Clare Gallagher
- Section of Neurosurgery, University of Calgary, Calgary, AB, Canada
- Department of Clinical Neurosciences, University of Calgary, Calgary, AB, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
| | - Eric P Thelin
- Medical Unit Neurology, Karolinska University Hospital, Stockholm, Sweden
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Rahul Raj
- Department of Neurosurgery, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Marcel Aries
- Department of Intensive Care, Maastricht University Medical Center+ and School of Mental Health and Neurosciences, University Maastricht, Maastricht, The Netherlands
| | - Logan Froese
- Medical Unit Neurology, Karolinska University Hospital, Stockholm, Sweden
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Andreas Kramer
- Department of Clinical Neurosciences, University of Calgary, Calgary, AB, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
- Department of Critical Care Medicine, University of Calgary, Calgary, AB, Canada
| | - Frederick A Zeiler
- Department of Biomedical Engineering, Price Faculty of Engineering, University of Manitoba, Winnipeg, MB, Canada
- Section of Neurosurgery, Department of Surgery, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
- Pan Am Clinic Foundation, Winnipeg, MB, Canada
| |
Collapse
|
2
|
Wang Q, Pan M, Kreiss L, Samaei S, Carp SA, Johansson JD, Zhang Y, Wu M, Horstmeyer R, Diop M, Li DDU. A comprehensive overview of diffuse correlation spectroscopy: Theoretical framework, recent advances in hardware, analysis, and applications. Neuroimage 2024; 298:120793. [PMID: 39153520 DOI: 10.1016/j.neuroimage.2024.120793] [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: 05/19/2024] [Revised: 07/23/2024] [Accepted: 08/14/2024] [Indexed: 08/19/2024] Open
Abstract
Diffuse correlation spectroscopy (DCS) is a powerful tool for assessing microvascular hemodynamic in deep tissues. Recent advances in sensors, lasers, and deep learning have further boosted the development of new DCS methods. However, newcomers might feel overwhelmed, not only by the already-complex DCS theoretical framework but also by the broad range of component options and system architectures. To facilitate new entry to this exciting field, we present a comprehensive review of DCS hardware architectures (continuous-wave, frequency-domain, and time-domain) and summarize corresponding theoretical models. Further, we discuss new applications of highly integrated silicon single-photon avalanche diode (SPAD) sensors in DCS, compare SPADs with existing sensors, and review other components (lasers, sensors, and correlators), as well as data analysis tools, including deep learning. Potential applications in medical diagnosis are discussed and an outlook for the future directions is provided, to offer effective guidance to embark on DCS research.
Collapse
Affiliation(s)
- Quan Wang
- Department of Biomedical Engineering, Faculty of Engineering, University of Strathclyde, Glasgow, United Kingdom
| | - Mingliang Pan
- Department of Biomedical Engineering, Faculty of Engineering, University of Strathclyde, Glasgow, United Kingdom
| | - Lucas Kreiss
- Department of Biomedical Engineering, Duke University, Durham, NC, United States
| | - Saeed Samaei
- Department of Medical and Biophysics, Schulich School of Medical & Dentistry, Western University, London, Ontario, Canada; Lawson Health Research Institute, Imaging Program, London, Ontario, Canada
| | - Stefan A Carp
- Massachusetts General Hospital, Optics at Athinoula A. Martinos Center for Biomedical Imaging, Harvard Medical School, Charlestown, MA, United States
| | | | - Yuanzhe Zhang
- Department of Biomedical Engineering, Faculty of Engineering, University of Strathclyde, Glasgow, United Kingdom
| | - Melissa Wu
- Department of Biomedical Engineering, Duke University, Durham, NC, United States
| | - Roarke Horstmeyer
- Department of Biomedical Engineering, Duke University, Durham, NC, United States
| | - Mamadou Diop
- Department of Medical and Biophysics, Schulich School of Medical & Dentistry, Western University, London, Ontario, Canada; Lawson Health Research Institute, Imaging Program, London, Ontario, Canada
| | - David Day-Uei Li
- Department of Biomedical Engineering, Faculty of Engineering, University of Strathclyde, Glasgow, United Kingdom.
| |
Collapse
|
3
|
Gomez A, Froese L, Griesdale D, Thelin EP, Raj R, van Iperenburg L, Tas J, Aries M, Stein KY, Gallagher C, Bernard F, Kramer AH, Zeiler FA. Prognostic value of near-infrared spectroscopy regional oxygen saturation and cerebrovascular reactivity index in acute traumatic neural injury: a CAnadian High-Resolution Traumatic Brain Injury (CAHR-TBI) Cohort Study. Crit Care 2024; 28:78. [PMID: 38486211 PMCID: PMC10938687 DOI: 10.1186/s13054-024-04859-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 03/02/2024] [Indexed: 03/18/2024] Open
Abstract
BACKGROUND Near-infrared spectroscopy regional cerebral oxygen saturation (rSO2) has gained interest as a raw parameter and as a basis for measuring cerebrovascular reactivity (CVR) due to its noninvasive nature and high spatial resolution. However, the prognostic utility of these parameters has not yet been determined. This study aimed to identify threshold values of rSO2 and rSO2-based CVR at which outcomes worsened following traumatic brain injury (TBI). METHODS A retrospective multi-institutional cohort study was performed. The cohort included TBI patients treated in four adult intensive care units (ICU). The cerebral oxygen indices, COx (using rSO2 and cerebral perfusion pressure) as well as COx_a (using rSO2 and arterial blood pressure) were calculated for each patient. Grand mean thresholds along with exposure-based thresholds were determined utilizing sequential chi-squared analysis and univariate logistic regression, respectively. RESULTS In the cohort of 129 patients, there was no identifiable threshold for raw rSO2 at which outcomes were found to worsen. For both COx and COx_a, an optimal grand mean threshold value of 0.2 was identified for both survival and favorable outcomes, while percent time above - 0.05 was uniformly found to have the best discriminative value. CONCLUSIONS In this multi-institutional cohort study, raw rSO2was found to contain no significant prognostic information. However, rSO2-based indices of CVR, COx and COx_a, were found to have a uniform grand mean threshold of 0.2 and exposure-based threshold of - 0.05, above which clinical outcomes markedly worsened. This study lays the groundwork to transition to less invasive means of continuously measuring CVR.
Collapse
Affiliation(s)
- Alwyn Gomez
- Department of Human Anatomy and Cell Science, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Canada.
- Section of Neurosurgery, Department of Surgery, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada.
| | - Logan Froese
- Department of Biomedical Engineering, Price Faculty of Engineering, University of Manitoba, Winnipeg, MB, Canada
| | - Donald Griesdale
- Department of Anesthesiology, Pharmacology and Therapeutics, University of British Columbia, Vancouver, BC, Canada
| | - Eric P Thelin
- Department of Neurology, Karolinska University Hospital, Stockholm, Sweden
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Rahul Raj
- Department of Neurosurgery, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Levi van Iperenburg
- Department of Intensive Care, Maastricht University Medical Center+, Maastricht, The Netherlands
- School of Mental Health and Neurosciences, University Maastricht, Maastricht, The Netherlands
| | - Jeanette Tas
- Department of Intensive Care, Maastricht University Medical Center+, Maastricht, The Netherlands
- School of Mental Health and Neurosciences, University Maastricht, Maastricht, The Netherlands
| | - Marcel Aries
- Department of Intensive Care, Maastricht University Medical Center+, Maastricht, The Netherlands
- School of Mental Health and Neurosciences, University Maastricht, Maastricht, The Netherlands
| | - Kevin Y Stein
- Department of Biomedical Engineering, Price Faculty of Engineering, University of Manitoba, Winnipeg, MB, Canada
| | - Clare Gallagher
- Section of Neurosurgery, Department of Clinical Neurosciences, Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
- Department of Clinical Neurosciences, University of Calgary, Calgary, AB, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
| | - Francis Bernard
- Section of Critical Care, Department of Medicine, University of Montreal, Montreal, QC, Canada
| | - Andreas H Kramer
- Department of Clinical Neurosciences, University of Calgary, Calgary, AB, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
- Department of Critical Care Medicine, University of Calgary, Calgary, AB, Canada
| | - Frederick A Zeiler
- Section of Neurosurgery, Department of Surgery, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
- Department of Biomedical Engineering, Price Faculty of Engineering, University of Manitoba, Winnipeg, MB, Canada
- Department of Neurology, Karolinska University Hospital, Stockholm, Sweden
- Centre on Aging, University of Manitoba, Winnipeg, Canada
- Division of Anaesthesia, Department of Medicine, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK
| |
Collapse
|
4
|
Premchand B, Zhang Z, Yu J, Yang T, Ang KK. Synchronizing Motor Imagery Cue in fNIRS Brain-Computer Interface to reduce confounding effects of respiration. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2023; 2023:1-4. [PMID: 38083697 DOI: 10.1109/embc40787.2023.10340679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
Functional near-infrared spectroscopy (fNIRS) is a neuroimaging method that measures oxygenated hemoglobin (HbO) levels in the brain to infer neural activity using near-infrared light. Measured HbO levels are directly affected by a person's respiration. Hence, respiration cycles tend to confound fNIRS readings in motor imagery-based fNIRS Brain-Computer Interfaces (BCI). To reduce this confounding effect, we propose a method of synchronizing the motor imagery cue timing with the subject's respiration cycle using a breathing sensor. We conducted an experiment to collect 160 single trials from 10 subjects performing motor imagery using an fNIRS-based BCI and the breathing sensor. We then compared the HbO levels in trials with and without respiration synchronization. The results showed that respiration synchronization yielded HbO levels that were less dispersed across trials, and a negative correlation between the dispersion index of HbO levels with MI decoding accuracies was found across the 10 subjects. This showed that synchronizing motor imagery cues to respiration can yield increased HbO level consistency leading to better MI performance. Hence, the proposed method holds promise to improve the decoding performance of fNIRS-BCI by reducing the confounding effects of respiration.
Collapse
|
5
|
Bäumer N, Ogi S, Borsdorf L, Yamaguchi S, Fernández G. Amphiphile desymmetrisation-induced steric relief governs self-assembly pathways in aqueous media. Chem Commun (Camb) 2023. [PMID: 37365975 DOI: 10.1039/d3cc02297h] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Abstract
Herein, we show that a straightforward desymmetrisation of a bolaamphiphilic chromophore can tune aromatic interactions and exciton coupling upon self-assembly. As a result, multiple assembled states become accesible offering a facile approach to induce pathway complexity in aqueous media.
Collapse
Affiliation(s)
- Nils Bäumer
- Organisch-Chemisches Institut, Universität Münster, Corrensstraße 36, Münster 48149, Germany.
- Department of Chemistry, Graduate School of Science, and Integrated Research Consortium on Chemical Science (IRCCS), Nagoya University, Furo, Chikusa, Nagoya 464-8602, Japan
| | - Soichiro Ogi
- Department of Chemistry, Graduate School of Science, and Integrated Research Consortium on Chemical Science (IRCCS), Nagoya University, Furo, Chikusa, Nagoya 464-8602, Japan
| | - Lorenz Borsdorf
- Organisch-Chemisches Institut, Universität Münster, Corrensstraße 36, Münster 48149, Germany.
| | - Shigehiro Yamaguchi
- Department of Chemistry, Graduate School of Science, and Integrated Research Consortium on Chemical Science (IRCCS), Nagoya University, Furo, Chikusa, Nagoya 464-8602, Japan
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Furo, Chikusa, Nagoya 464-8602, Japan.
| | - Gustavo Fernández
- Organisch-Chemisches Institut, Universität Münster, Corrensstraße 36, Münster 48149, Germany.
| |
Collapse
|
6
|
Davydov R, Zaitceva A, Davydov V, Isakova D, Mazing M. New Methodology of Human Health Express Diagnostics Based on Pulse Wave Measurements and Occlusion Test. J Pers Med 2023; 13:jpm13030443. [PMID: 36983623 PMCID: PMC10052938 DOI: 10.3390/jpm13030443] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 02/24/2023] [Accepted: 02/27/2023] [Indexed: 03/05/2023] Open
Abstract
Nowadays, with the increase in the rhythm of life, the relevance of using express diagnostics methods for human health state estimation has significantly increased. We present a new express diagnostics method based on non-invasive measurements (the pulse wave shape, heart rate, blood pressure, and oxygen saturation of blood vessels and tissues). A feature of these measurements is that they can be carried out both in the hospital and at home. The new compact and portable optical hardware–software complex has been developed to measure tissue oxygen saturation. This complex makes it possible to reduce the measurement time from 60 min to 7–8 min, which reduces the likelihood of artifacts in the measurement process and increases its reliability. A new technique has been developed to carry out these measurements. A new optical sensor based on a line of charge-coupled devices has been developed to register a pulse wave in the far peripheral zone. The developed new technique for processing the pulse waveform and data on the oxygen saturation of hemoglobin in the blood and tissues allows a person to obtain additional information about their state of health independently. It will help to make conclusions about taking the necessary measures. This additional information allows the attending physician to provide more effective control over the course of treatment of the patient at any time since the methods of express diagnostics proposed by us have no restrictions on the number of applications. The functional state of more than 300 patients was studied. The results of various measurements are presented.
Collapse
Affiliation(s)
- Roman Davydov
- Institute of Physics and Mechanics, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia
- Correspondence:
| | - Anna Zaitceva
- Institute for Analytical Instrumentation of the Russian Academy of Sciences, 190103 St. Petersburg, Russia
- Institute of Biomedical Systems and Biotechnology, Peter the Great, St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia
| | - Vadim Davydov
- Institute of Electronics and Telecommunications, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia
- Department of Photonics and Communication Lines, The Bonch-Bruevich Saint Petersburg State University of Telecommunication, 193232 St. Petersburg, Russia
| | - Daria Isakova
- Department of Photonics and Communication Lines, The Bonch-Bruevich Saint Petersburg State University of Telecommunication, 193232 St. Petersburg, Russia
| | - Maria Mazing
- Institute for Analytical Instrumentation of the Russian Academy of Sciences, 190103 St. Petersburg, Russia
- Institute of Electronics and Telecommunications, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia
| |
Collapse
|
7
|
Yatsyk LM, Karkashadze GA, Altunin VV, Povalyaeva IA, Prudnikov PA, Namazova-Baranova LS, Vishneva EA. Functional Near-Infrared Spectroscopy as Promising Method for Studying Cognitive Functions in Children. CURRENT PEDIATRICS 2023. [DOI: 10.15690/vsp.v21i6.2490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The description of new promising method of functional neuroimaging, functional near-infrared spectroscopy (fNIRS), is presented. General information on functional tomography and its features in children are given. Brief description on the history of fNIRS development, the method itself, its advantages and disadvantages are covered. fNIRS implementation areas in science and clinical practice are clarified. fNIRS features are described, and the role of this method among others in functional tomography is determined. It was noted that fNIRS significantly complements other research and diagnostic methods, including functional magnetic resonance imaging, electroencephalography, induced potentials, thereby expanding the range of scientific and clinical issues that can be solved by functional neuroimaging.
Collapse
Affiliation(s)
- L. M. Yatsyk
- Research Institute of Pediatrics and Children’s Health in Petrovsky National Research Centre of Surgery
| | - G. A. Karkashadze
- Research Institute of Pediatrics and Children’s Health in Petrovsky National Research Centre of Surgery
| | - V. V. Altunin
- Research Institute of Pediatrics and Children’s Health in Petrovsky National Research Centre of Surgery
| | - I. A. Povalyaeva
- Research Institute of Pediatrics and Children’s Health in Petrovsky National Research Centre of Surgery
| | - P. A. Prudnikov
- Research Institute of Pediatrics and Children’s Health in Petrovsky National Research Centre of Surgery
| | - L. S. Namazova-Baranova
- Research Institute of Pediatrics and Children’s Health in Petrovsky National Research Centre of Surgery; Pirogov Russian National Research Medical University
| | - E. A. Vishneva
- Research Institute of Pediatrics and Children’s Health in Petrovsky National Research Centre of Surgery; Pirogov Russian National Research Medical University
| |
Collapse
|
8
|
Age-Related Changes in Skeletal Muscle Oxygen Utilization. J Funct Morphol Kinesiol 2022; 7:jfmk7040087. [PMID: 36278748 PMCID: PMC9590092 DOI: 10.3390/jfmk7040087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 09/07/2022] [Accepted: 09/08/2022] [Indexed: 11/17/2022] Open
Abstract
The cardiovascular and skeletal muscle systems are intrinsically interconnected, sharing the goal of delivering oxygen to metabolically active tissue. Deficiencies within those systems that affect oxygen delivery to working tissues are a hallmark of advancing age. Oxygen delivery and utilization are reflected as muscle oxygen saturation (SmO2) and are assessed using near-infrared resonance spectroscopy (NIRS). SmO2 has been observed to be reduced by ~38% at rest, ~24% during submaximal exercise, and ~59% during maximal exercise with aging (>65 y). Furthermore, aging prolongs restoration of SmO2 back to baseline by >50% after intense exercise. Regulatory factors that contribute to reduced SmO2 with age include blood flow, capillarization, endothelial cells, nitric oxide, and mitochondrial function. These mechanisms are governed by reactive oxygen species (ROS) at the cellular level. However, mishandling of ROS with age ultimately leads to alterations in structure and function of the regulatory factors tasked with maintaining SmO2. The purpose of this review is to provide an update on the current state of the literature regarding age-related effects in SmO2. Furthermore, we attempt to bridge the gap between SmO2 and associated underlying mechanisms affected by aging.
Collapse
|
9
|
Wang H, Gao L, Fan T, Zhang C, Zhang B, Al-Hartomy OA, Al-Ghamdi A, Wageh S, Qiu M, Zhang H. Strategic Design of Intelligent-Responsive Nanogel Carriers for Cancer Therapy. ACS APPLIED MATERIALS & INTERFACES 2021; 13:54621-54647. [PMID: 34767342 DOI: 10.1021/acsami.1c13634] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Owing to the distinctive constituents of tumor tissue from those healthy organs, nanomedicine strategies show significant potentials in smart drug delivery. Nowadays, stimuli-responsive nanogels are playing increasingly important roles in the application of cancer therapy because of their sensitivity to various internal or external physicochemical stimuli, which exhibit site-specific and markedly enhanced drug release. Besides, nanogels are promising as drug carriers because of their porous structures, good biocompatibility, large surface area, and excellent capability with drugs. Taking advantage of multiresponsiveness, recent years have witnessed the rapid evolution of stimulus-responsive nanogels from monoresponsive to multiresponsive systems; however, there lacks a comprehensive review summarizing these reports. In this Review, we discuss the properties, synthesis, and characterization of nanogels. Moreover, tumor microenvironment and corresponding designing strategies for stimuli-response nanogels, both exogenous (temperature, magnetic field, light) and endogenous (pH, biomolecular, redox, ROS, pressure, hypoxia) are summarized on the basis of the recent advances in multistimuli-responsive nanogel systems. Nanogel and two-dimensional material composites show excellent performance in the field of constructing multistimulus-responsive nanoparticles and precise intelligent drug release integrated system for multimodal cancer diagnosis and therapy. Finally, potential progresses and suggestions are provided for the further design of hybrid nanogels based on emerging two-dimensional materials.
Collapse
Affiliation(s)
- Hao Wang
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, College of Optoelectronic Engineering, Institute of Microscale Optoelectronics, Shenzhen Institute of Translational Medicine, Department of Otolaryngology, Shenzhen Second People's Hospital, the First Affiliated Hospital of Shenzhen University, Shenzhen University, Shenzhen 518060, China
| | - Lingfeng Gao
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, No. 2318 Yuhangtang Rd., Cangqian, Yuhang District, Hangzhou 311121, China
| | - Taojian Fan
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, College of Optoelectronic Engineering, Institute of Microscale Optoelectronics, Shenzhen Institute of Translational Medicine, Department of Otolaryngology, Shenzhen Second People's Hospital, the First Affiliated Hospital of Shenzhen University, Shenzhen University, Shenzhen 518060, China
| | - Chen Zhang
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, College of Optoelectronic Engineering, Institute of Microscale Optoelectronics, Shenzhen Institute of Translational Medicine, Department of Otolaryngology, Shenzhen Second People's Hospital, the First Affiliated Hospital of Shenzhen University, Shenzhen University, Shenzhen 518060, China
| | - Bin Zhang
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, College of Optoelectronic Engineering, Institute of Microscale Optoelectronics, Shenzhen Institute of Translational Medicine, Department of Otolaryngology, Shenzhen Second People's Hospital, the First Affiliated Hospital of Shenzhen University, Shenzhen University, Shenzhen 518060, China
| | - Omar A Al-Hartomy
- Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Ahmed Al-Ghamdi
- Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Swelm Wageh
- Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Meng Qiu
- Key Laboratory of Marine Chemistry Theory and Technology, Ocean University of China, Ministry of Education, Qingdao 266100, China
| | - Han Zhang
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, College of Optoelectronic Engineering, Institute of Microscale Optoelectronics, Shenzhen Institute of Translational Medicine, Department of Otolaryngology, Shenzhen Second People's Hospital, the First Affiliated Hospital of Shenzhen University, Shenzhen University, Shenzhen 518060, China
| |
Collapse
|
10
|
Yun S, Kim Y, Kim H, Lee S, Jeong U, Lee H, Choi YW, Cho S. Three-compartment-breast (3CB) prior-guided diffuse optical tomography based on dual-energy digital breast tomosynthesis (DBT). BIOMEDICAL OPTICS EXPRESS 2021; 12:4837-4851. [PMID: 34513228 PMCID: PMC8407844 DOI: 10.1364/boe.431244] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 07/01/2021] [Accepted: 07/03/2021] [Indexed: 05/18/2023]
Abstract
Diffuse optical tomography (DOT) is a non-invasive functional imaging modality that uses near-infrared (NIR) light to measure the oxygenation state and the concentration of hemoglobin. By complementarily using DOT with other anatomical imaging modalities, physicians can diagnose more accurately through additional functional image information. In breast imaging, diagnosis of dense breasts is often challenging because the bulky fibrous tissues may hinder the correct tumor characterization. In this work, we proposed a three-compartment-breast (3CB) decomposition-based prior-guided optical tomography for enhancing DOT image quality. We conjectured that the 3CB prior would lead to improvement of the spatial resolution and also of the contrast of the reconstructed tumor image, particularly for the dense breasts. We conducted a Monte-Carlo simulation to acquire dual-energy X-ray projections of a realistic 3D numerical breast phantom and performed digital breast tomosynthesis (DBT) for setting up a 3CB model. The 3CB prior was then used as a structural guide in DOT image reconstruction. The proposed method resulted in the higher spatial resolution of the recovered tumor even when the tumor is surrounded by the fibroglandular tissues compared with the typical two-composition-prior method or the standard Tikhonov regularization method.
Collapse
Affiliation(s)
- Sungho Yun
- Department of Nuclear and Quantum Engineering, KAIST, Daejeon 34141, Republic of Korea
| | - Yejin Kim
- Department of Nuclear and Quantum Engineering, KAIST, Daejeon 34141, Republic of Korea
| | - Hyeongseok Kim
- Department of Nuclear and Quantum Engineering, KAIST, Daejeon 34141, Republic of Korea
- KAIST Institute for Artificial Intelligence, KAIST, Daejeon 34141, Republic of Korea
| | - Seoyoung Lee
- Department of Nuclear and Quantum Engineering, KAIST, Daejeon 34141, Republic of Korea
| | - Uijin Jeong
- Department of Nuclear and Quantum Engineering, KAIST, Daejeon 34141, Republic of Korea
| | - Hoyeon Lee
- Department of Radiation and Oncology, MGH, Boston 02114, USA
| | - Young-wook Choi
- Korea Electrotechnology Research Institute, Ansan 15588, Republic of Korea
| | - Seungryong Cho
- Department of Nuclear and Quantum Engineering, KAIST, Daejeon 34141, Republic of Korea
- KAIST Institute for Artificial Intelligence, KAIST, Daejeon 34141, Republic of Korea
- KAIST Institutes for ITC and HST, KAIST, Daejeon 34141, Republic of Korea
| |
Collapse
|
11
|
Ma T, Wang S, Xia Y, Zhu X, Evans J, Sun Y, He S. CNN-based classification of fNIRS signals in motor imagery BCI system. J Neural Eng 2021; 18. [PMID: 33761480 DOI: 10.1088/1741-2552/abf187] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 03/24/2021] [Indexed: 11/11/2022]
Abstract
Objective. Development of a brain-computer interface (BCI) requires classification of brain neural activities to different states. Functional near-infrared spectroscopy (fNIRS) can measure the brain activities and has great potential for BCI. In recent years, a large number of classification algorithms have been proposed, in which deep learning methods, especially convolutional neural network (CNN) methods are successful. fNIRS signal has typical time series properties, we combined fNIRS data and kinds of CNN-based time series classification (TSC) methods to classify BCI task.Approach. In this study, participants were recruited for a left and right hand motor imagery experiment and the cerebral neural activities were recorded by fNIRS equipment (FOIRE-3000). TSC methods are used to distinguish the brain activities when imagining the left or right hand. We have tested the overall person, single person and overall person with single-channel classification results, and these methods achieved excellent classification results. We also compared the CNN-based TSC methods with traditional classification methods such as support vector machine.Main results. Experiments showed that the CNN-based methods have significant advantages in classification accuracy: the CNN-based methods have achieved remarkable results in the classification of left-handed and right-handed imagination tasks, reaching 98.6% accuracy on overall person, 100% accuracy on single person, and in the single-channel classification an accuracy of 80.1% has been achieved with the best-performing channel.Significance. These results suggest that using the CNN-based TSC methods can significantly improve the BCI performance and also lay the foundation for the miniaturization and portability of training rehabilitation equipment.
Collapse
Affiliation(s)
- Tengfei Ma
- Centre for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentations, Zhejiang University, Hangzhou, People's Republic of China.,Ningbo Research Institute, Zhejiang University, Ningbo 315100, People's Republic of China
| | - Shasha Wang
- Center for Optical and Electromagnetic Research, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, People's Republic of China
| | - Yuting Xia
- Centre for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentations, Zhejiang University, Hangzhou, People's Republic of China.,Ningbo Research Institute, Zhejiang University, Ningbo 315100, People's Republic of China
| | - Xinhua Zhu
- Ningbo Aolai Technology Ltd, Ningbo, People's Republic of China
| | - Julian Evans
- Centre for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentations, Zhejiang University, Hangzhou, People's Republic of China
| | - Yaoran Sun
- Centre for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentations, Zhejiang University, Hangzhou, People's Republic of China.,Ningbo Research Institute, Zhejiang University, Ningbo 315100, People's Republic of China
| | - Sailing He
- Centre for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentations, Zhejiang University, Hangzhou, People's Republic of China.,Ningbo Research Institute, Zhejiang University, Ningbo 315100, People's Republic of China.,Center for Optical and Electromagnetic Research, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, People's Republic of China
| |
Collapse
|
12
|
Cao L, Li P, Cui J, Wang X, Yao Y, Zhang M, Zheng M, Yang Z, Suo H, Wang Z. Achieving the potential multifunctional near-infrared materials Ca 3In 2-x Ga x Ge 3O 12:Cr 3+ using a solid state method. RSC Adv 2021; 11:10043-10053. [PMID: 35423516 PMCID: PMC8695478 DOI: 10.1039/d1ra00682g] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 03/01/2021] [Indexed: 11/21/2022] Open
Abstract
Near-infrared spectroscopy is developing rapidly in the fields of human detection and food analysis due to its fast response and non-invasive characteristics. Herein, we report the novel near-infrared garnet-type Ca3In2Ge3O12:xCr3+ and Ca3In2-x Ga x Ge3O12:0.07Cr3+ phosphors, in which there are two crystallographic sites (CaO8, InO6) that can be substituted by Cr3+, and cation regulation engineering for In3+ is utilized to tune the luminescence properties. Under the 480 nm excitation, the Ca3In2Ge3O12:xCr3+ phosphor emits a broad spectrum at 650-1150 nm, which matches well with the first biological window. The concentration quenching mechanism and luminescence mechanism of Ca3In2Ge3O12:xCr3+ were studied and the site assignment of the two luminescence centers was discussed using low temperature spectra and fluorescence decay curves. The application performance of the phosphor was improved by introducing Ga3+ to substitute for In3+, and the blue shift of nearly 50 nm was explained by crystal field and nephelauxetic effects. At the same time, a 24% increase in the activation energy of thermal quenching of phosphors was obtained, which has been analyzed using the mechanism of phonon transition and the change of structural rigidity. Thus, the near-infrared emitting Ca3In0.2Ga1.8Ge3O12:0.07Cr3+ phosphor was obtained, which has lower cost, higher emission intensity, and much better thermal stability, spreading the application of phosphors in plant far red light illumination, human body detection, and spectral conversion technology of silicon-based solar cells. Simultaneously, an example of a near-infrared plant illumination experiment is given, demonstrating that a cation substitution strategy based on crystal field control could be applied to tune spectral distribution and develop novel potential phosphors for practical optical application.
Collapse
Affiliation(s)
- Lingwei Cao
- National-Local Joint Engineering Laboratory of New Energy Photoelectric Devices, Hebei Key Laboratory of Optic-electronic Information and Materials, College of Physics Science & Technology, Hebei University Baoding 071002 China
| | - Panlai Li
- National-Local Joint Engineering Laboratory of New Energy Photoelectric Devices, Hebei Key Laboratory of Optic-electronic Information and Materials, College of Physics Science & Technology, Hebei University Baoding 071002 China
| | - Jia Cui
- National-Local Joint Engineering Laboratory of New Energy Photoelectric Devices, Hebei Key Laboratory of Optic-electronic Information and Materials, College of Physics Science & Technology, Hebei University Baoding 071002 China
| | - Xuejiao Wang
- National-Local Joint Engineering Laboratory of New Energy Photoelectric Devices, Hebei Key Laboratory of Optic-electronic Information and Materials, College of Physics Science & Technology, Hebei University Baoding 071002 China
| | - Yao Yao
- National-Local Joint Engineering Laboratory of New Energy Photoelectric Devices, Hebei Key Laboratory of Optic-electronic Information and Materials, College of Physics Science & Technology, Hebei University Baoding 071002 China
| | - Mengya Zhang
- National-Local Joint Engineering Laboratory of New Energy Photoelectric Devices, Hebei Key Laboratory of Optic-electronic Information and Materials, College of Physics Science & Technology, Hebei University Baoding 071002 China
| | - Mingjie Zheng
- National-Local Joint Engineering Laboratory of New Energy Photoelectric Devices, Hebei Key Laboratory of Optic-electronic Information and Materials, College of Physics Science & Technology, Hebei University Baoding 071002 China
| | - Zhibin Yang
- National-Local Joint Engineering Laboratory of New Energy Photoelectric Devices, Hebei Key Laboratory of Optic-electronic Information and Materials, College of Physics Science & Technology, Hebei University Baoding 071002 China
| | - Hao Suo
- National-Local Joint Engineering Laboratory of New Energy Photoelectric Devices, Hebei Key Laboratory of Optic-electronic Information and Materials, College of Physics Science & Technology, Hebei University Baoding 071002 China
| | - Zhijun Wang
- National-Local Joint Engineering Laboratory of New Energy Photoelectric Devices, Hebei Key Laboratory of Optic-electronic Information and Materials, College of Physics Science & Technology, Hebei University Baoding 071002 China
| |
Collapse
|
13
|
Imaging Hypoxia. Mol Imaging 2021. [DOI: 10.1016/b978-0-12-816386-3.00074-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
|
14
|
Yang L, Wabnitz H, Gladytz T, Sudakou A, Macdonald R, Grosenick D. Space-enhanced time-domain diffuse optics for determination of tissue optical properties in two-layered structures. BIOMEDICAL OPTICS EXPRESS 2020; 11:6570-6589. [PMID: 33282509 PMCID: PMC7687957 DOI: 10.1364/boe.402181] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 09/18/2020] [Accepted: 09/28/2020] [Indexed: 05/05/2023]
Abstract
A novel methodology for solving the inverse problem of diffuse optics for two-layered structures is proposed to retrieve the absolute quantities of optical absorption and reduced scattering coefficients of the layers simultaneously. A liquid phantom with various optical absorption properties in the deep layer is prepared and experimentally investigated using the space-enhanced time-domain method. Monte-Carlo simulations are applied to analyze the different measurements in time domain, space domain, and by the new methodology. The deviations of retrieved values from nominal values of both layers' optical properties are simultaneously reduced to a very low extent compared to the single-domain methods. The reliability and uncertainty of the retrieval performance are also considerably improved by the new methodology. It is observed in time-domain analyses that for the deep layer the retrieval of absorption coefficient is almost not affected by the scattering properties and this kind of "deep scattering neutrality" is investigated and overcome as well.
Collapse
Affiliation(s)
- Lin Yang
- Physikalisch-Technische Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, Germany
- Institute of Optics and Atomic Physics, Technical University of Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany
| | - Heidrun Wabnitz
- Physikalisch-Technische Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, Germany
| | - Thomas Gladytz
- Physikalisch-Technische Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, Germany
| | - Aleh Sudakou
- Nalecz Institute of Biocybernetics and Biomedical Engineering, Polish Academy of Sciences, Trojdena 4, 02-109 Warsaw, Poland
| | - Rainer Macdonald
- Physikalisch-Technische Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, Germany
- Institute of Optics and Atomic Physics, Technical University of Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany
| | - Dirk Grosenick
- Physikalisch-Technische Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, Germany
| |
Collapse
|
15
|
Pinti P, Tachtsidis I, Hamilton A, Hirsch J, Aichelburg C, Gilbert S, Burgess PW. The present and future use of functional near-infrared spectroscopy (fNIRS) for cognitive neuroscience. Ann N Y Acad Sci 2020; 1464:5-29. [PMID: 30085354 PMCID: PMC6367070 DOI: 10.1111/nyas.13948] [Citation(s) in RCA: 420] [Impact Index Per Article: 105.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 07/10/2018] [Accepted: 07/13/2018] [Indexed: 01/11/2023]
Abstract
The past few decades have seen a rapid increase in the use of functional near-infrared spectroscopy (fNIRS) in cognitive neuroscience. This fast growth is due to the several advances that fNIRS offers over the other neuroimaging modalities such as functional magnetic resonance imaging and electroencephalography/magnetoencephalography. In particular, fNIRS is harmless, tolerant to bodily movements, and highly portable, being suitable for all possible participant populations, from newborns to the elderly and experimental settings, both inside and outside the laboratory. In this review we aim to provide a comprehensive and state-of-the-art review of fNIRS basics, technical developments, and applications. In particular, we discuss some of the open challenges and the potential of fNIRS for cognitive neuroscience research, with a particular focus on neuroimaging in naturalistic environments and social cognitive neuroscience.
Collapse
Affiliation(s)
- Paola Pinti
- Department of Medical Physics and Biomedical EngineeringUniversity College LondonLondonUK
- Institute of Cognitive NeuroscienceUniversity College LondonLondonUK
| | - Ilias Tachtsidis
- Department of Medical Physics and Biomedical EngineeringUniversity College LondonLondonUK
| | - Antonia Hamilton
- Institute of Cognitive NeuroscienceUniversity College LondonLondonUK
| | - Joy Hirsch
- Department of Medical Physics and Biomedical EngineeringUniversity College LondonLondonUK
- Department of PsychiatryYale School of MedicineNew HavenConnecticut
- Department of NeuroscienceYale School of MedicineNew HavenConnecticut
- Comparative MedicineYale School of MedicineNew HavenConnecticut
| | | | - Sam Gilbert
- Institute of Cognitive NeuroscienceUniversity College LondonLondonUK
| | - Paul W. Burgess
- Institute of Cognitive NeuroscienceUniversity College LondonLondonUK
| |
Collapse
|
16
|
Hong E, Liu L, Bai L, Xia C, Gao L, Zhang L, Wang B. Control synthesis, subtle surface modification of rare-earth-doped upconversion nanoparticles and their applications in cancer diagnosis and treatment. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 105:110097. [DOI: 10.1016/j.msec.2019.110097] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2018] [Revised: 07/14/2019] [Accepted: 08/15/2019] [Indexed: 01/26/2023]
|
17
|
Hamaoka T, McCully KK. Review of early development of near-infrared spectroscopy and recent advancement of studies on muscle oxygenation and oxidative metabolism. J Physiol Sci 2019; 69:799-811. [PMID: 31359263 PMCID: PMC10717702 DOI: 10.1007/s12576-019-00697-2] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Accepted: 07/22/2019] [Indexed: 02/07/2023]
Abstract
Near-infrared spectroscopy (NIRS) has become an increasingly valuable tool to monitor tissue oxygenation (Toxy) in vivo. Observations of changes in the absorption of light with Toxy have been recognized as early as 1876, leading to a milestone NIRS paper by Jöbsis in 1977. Changes in the absorption and scatting of light in the 700-850-nm range has been successfully used to evaluate Toxy. The most practical devices use continuous-wave light providing relative values of Toxy. Phase-modulated or pulsed light can monitor both absorption and scattering providing more accurate signals. NIRS provides excellent time resolution (~ 10 Hz), and multiple source-detector pairs can be used to provide low-resolution imaging. NIRS has been applied to a wide range of populations. Continued development of NIRS devices in terms of lower cost, better detection of both absorption and scattering, and smaller size will lead to a promising future for NIRS studies.
Collapse
Affiliation(s)
- Takafumi Hamaoka
- Department of Sports Medicine for Health Promotion, Tokyo Medical University, 6-1-1 Shinjuku, Shinjuku-ku, Tokyo, 160-8402, Japan.
| | - Kevin K McCully
- Department of Kinesiology, University of Georgia, 115 Ramsey Center, 330 River Road, Athens, GA, 30602, USA
| |
Collapse
|
18
|
Almajidy RK, Mankodiya K, Abtahi M, Hofmann UG. A Newcomer's Guide to Functional Near Infrared Spectroscopy Experiments. IEEE Rev Biomed Eng 2019; 13:292-308. [PMID: 31634142 DOI: 10.1109/rbme.2019.2944351] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This review presents a practical primer for functional near-infrared spectroscopy (fNIRS) with respect to technology, experimentation, and analysis software. Its purpose is to jump-start interested practitioners considering utilizing a non-invasive, versatile, nevertheless challenging window into the brain using optical methods. We briefly recapitulate relevant anatomical and optical foundations and give a short historical overview. We describe competing types of illumination (trans-illumination, reflectance, and differential reflectance) and data collection methods (continuous wave, time domain and frequency domain). Basic components (light sources, detection, and recording components) of fNIRS systems are presented. Advantages and limitations of fNIRS techniques are offered, followed by a list of very practical recommendations for its use. A variety of experimental and clinical studies with fNIRS are sampled, shedding light on many brain-related ailments. Finally, we describe and discuss a number of freely available analysis and presentation packages suited for data analysis. In conclusion, we recommend fNIRS due to its ever-growing body of clinical applications, state-of-the-art neuroimaging technique and manageable hardware requirements. It can be safely concluded that fNIRS adds a new arrow to the quiver of neuro-medical examinations due to both its great versatility and limited costs.
Collapse
|
19
|
Yang L, Wabnitz H, Gladytz T, Macdonald R, Grosenick D. Spatially-enhanced time-domain NIRS for accurate determination of tissue optical properties. OPTICS EXPRESS 2019; 27:26415-26431. [PMID: 31674524 DOI: 10.1364/oe.27.026415] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
A multivariate method integrating time and space resolved techniques of near-infrared spectroscopy is proposed for simultaneously retrieving the absolute quantities of optical absorption and scattering properties in tissues. The time-domain feature of photon migration is advantageously constrained and regularized by its spatially-resolved amplitude patterns in the inverse procedure. Measurements of tissue-mimicking phantoms with various optical properties are analyzed with Monte-Carlo simulations to validate the method performance. The uniqueness, stability, and uncertainty of the method are discussed.
Collapse
|
20
|
Skau S, Bunketorp-Käll L, Kuhn HG, Johansson B. Mental Fatigue and Functional Near-Infrared Spectroscopy (fNIRS) - Based Assessment of Cognitive Performance After Mild Traumatic Brain Injury. Front Hum Neurosci 2019; 13:145. [PMID: 31139065 PMCID: PMC6527600 DOI: 10.3389/fnhum.2019.00145] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 04/16/2019] [Indexed: 11/30/2022] Open
Abstract
Pathological mental fatigue after mild traumatic brain injury (TBI-MF) is characterized by pronounced mental fatigue after cognitive activity. The neurological origin is unknown, and we aimed in the present study to investigate how prolonged mental activity affects cognitive performance and its neural correlates in individuals with TBI-MF. We recruited individuals with TBI-MF (n = 20) at least 5 months after injury, and age-matched healthy controls (n = 20). We used functional near-infrared spectroscopy (fNIRS) to assess hemodynamic changes in the frontal cortex. The self-assessed mental energy level was measured with a visual analog scale (VAS) before and after the experimental procedure. A battery of six neuropsychological tests including Stroop–Simon, Symbol Search, Digit Span, Parallel Serial Mental Operation (PaSMO), Sustained Attention and Working Memory test, and Digit Symbol Coding (DSC) were used. The sequence was repeated once after an 8 min sustained-attention test. The test procedure lasted 2½ h. The experimental procedure resulted in a decrease in mental energy in the TBI-MF group, compared to controls (interaction, p < 0.001, ηp2 = 0.331). The TBI-MF group performed at a similar level on both DSC tests, whereas the controls improved their performance in the second session (interaction, p < 0.01, ηp2 = 0.268). During the Stroop–Simon test, the fNIRS event-related response showed no time effect. However, the TBI-MF group exhibited lower oxygenated hemoglobin (oxy-Hb) concentrations in the frontal polar area (FPA), ventrolateral motor cortex, and dorsolateral prefrontal cortex (DLPFC) from the beginning of the test session. A Stroop and Group interaction was found in the left ventrolateral prefrontal cortex showing that the TBI-MF group did have the same oxy-Hb concentration for both congruent and incongruent trials, whereas the controls had more oxy-Hb in the incongruent trial compared to the congruent trial (interaction, p < 0.01, ηp2 = 0.227). In sum these results indicate that individuals with TBI-MF have a reduced ability to recruit the frontal cortex, which is correlated with self-reported mental fatigue. This may result both in deterioration of cognitive function and the experience of a mental fatigue after extended mental activity.
Collapse
Affiliation(s)
- Simon Skau
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Lina Bunketorp-Käll
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Centre for Advanced Reconstruction of Extremities, Sahlgrenska University Hospital, Mölndal, Sweden
| | - Hans Georg Kuhn
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Department of Neurology, Center for Stroke Research, Charité - Universitätsmedizin, Berlin, Germany
| | - Birgitta Johansson
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| |
Collapse
|
21
|
Ozaki Y. Recent Advances in Molecular Spectroscopy of Electronic and Vibrational Transitions in Condensed Phase and Its Application to Chemistry. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2019. [DOI: 10.1246/bcsj.20180319] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Yukihiro Ozaki
- School of Science and Technology, Kwansei Gakuin University, Sanda, Hyogo 669-1337, Japan
| |
Collapse
|
22
|
Wang H, Chen Q, Zhou S. Carbon-based hybrid nanogels: a synergistic nanoplatform for combined biosensing, bioimaging, and responsive drug delivery. Chem Soc Rev 2018; 47:4198-4232. [PMID: 29667656 DOI: 10.1039/c7cs00399d] [Citation(s) in RCA: 141] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Nanosized crosslinked polymer networks, named as nanogels, are playing an increasingly important role in a diverse range of applications by virtue of their porous structures, large surface area, good biocompatibility and responsiveness to internal and/or external chemico-physical stimuli. Recently, a variety of carbon nanomaterials, such as carbon quantum dots, graphene/graphene oxide nanosheets, fullerenes, carbon nanotubes, and nanodiamonds, have been embedded into responsive polymer nanogels, in order to integrate the unique electro-optical properties of carbon nanomaterials with the merits of nanogels into a single hybrid nanogel system for improvement of their applications in nanomedicine. A vast number of studies have been pursued to explore the applications of carbon-based hybrid nanogels in biomedical areas for biosensing, bioimaging, and smart drug carriers with combinatorial therapies and/or theranostic ability. New synthetic methods and structures have been developed to prepare carbon-based hybrid nanogels with versatile properties and functions. In this review, we summarize the latest developments and applications and address the future perspectives of these carbon-based hybrid nanogels in the biomedical field.
Collapse
Affiliation(s)
- Hui Wang
- High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, Anhui, P. R. China.
| | | | | |
Collapse
|
23
|
Jiang Y, Pu K. Advanced Photoacoustic Imaging Applications of Near-Infrared Absorbing Organic Nanoparticles. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1700710. [PMID: 28597608 DOI: 10.1002/smll.201700710] [Citation(s) in RCA: 140] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 03/25/2017] [Indexed: 05/20/2023]
Abstract
Progress of nanotechnology in recent years has stimulated fast development of nanoparticles in biomedical research. Photoacoustic (PA) imaging as an emerging non-invasive technique in molecular imaging has improved imaging depth relative to conventional optical imaging, demonstrating great potential in clinical applications. The convergence of nanotechnology and PA imaging has enabled a broad spectrum of new opportunities in fundamental biology and translation medicine. This review focuses on the recent advances of organic nanoparticles in PA imaging applications. Near-infrared absorbing organic nanoparticles are classified and discussed according to their different imaging applications, which include tumor imaging, gastrointestinal imaging, sentinel lymph node imaging, disease microenvironment imaging and real-time drug imaging. The chemistry and PA properties of organic nanoparticles are discussed in details to highlight their own merits, and their challenges and perspectives in PA imaging are also discussed.
Collapse
Affiliation(s)
- Yuyan Jiang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, 637459, Singapore
| | - Kanyi Pu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, 637459, Singapore
| |
Collapse
|
24
|
Lin S, Shah A, Hernández-Gil J, Stanziola A, Harriss BI, Matsunaga TO, Long N, Bamber J, Tang MX. Optically and acoustically triggerable sub-micron phase-change contrast agents for enhanced photoacoustic and ultrasound imaging. PHOTOACOUSTICS 2017; 6:26-36. [PMID: 28507898 PMCID: PMC5423321 DOI: 10.1016/j.pacs.2017.04.001] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 03/10/2017] [Accepted: 04/08/2017] [Indexed: 05/20/2023]
Abstract
We demonstrate a versatile phase-change sub-micron contrast agent providing three modes of contrast enhancement: 1) photoacoustic imaging contrast, 2) ultrasound contrast with optical activation, and 3) ultrasound contrast with acoustic activation. This agent, which we name 'Cy-droplet', has the following novel features. It comprises a highly volatile perfluorocarbon for easy versatile activation, and a near-infrared optically absorbing dye chosen to absorb light at a wavelength with good tissue penetration. It is manufactured via a 'microbubble condensation' method. The phase-transition of Cy-droplets can be optically triggered by pulsed-laser illumination, inducing photoacoustic signal and forming stable gas bubbles that are visible with echo-ultrasound in situ. Alternatively, Cy-droplets can be converted to microbubble contrast agents upon acoustic activation with clinical ultrasound. Potentially all modes offer extravascular contrast enhancement because of the sub-micron initial size. Such versatility of acoustic and optical 'triggerability' can potentially improve multi-modality imaging, molecularly targeted imaging and controlled drug release.
Collapse
Affiliation(s)
- Shengtao Lin
- Department of Bioengineering, Imperial College London, London, UK
| | - Anant Shah
- Joint Department of Physics and CRUK Cancer Imaging Centre, The Institute of Cancer Research and The Royal Marsden NHS Foundation Trust, London, England, UK
| | | | | | | | | | - Nicholas Long
- Department of Chemistry, Imperial College London, London, UK
| | - Jeffrey Bamber
- Joint Department of Physics and CRUK Cancer Imaging Centre, The Institute of Cancer Research and The Royal Marsden NHS Foundation Trust, London, England, UK
| | - Meng-Xing Tang
- Department of Bioengineering, Imperial College London, London, UK
| |
Collapse
|
25
|
Dou K, Zhu W, Zou Y, Gu Y, Li J, Zhang S, Liu Z, Zeng H. Metallic oxide nanocrystals with near-infrared plasmon resonance for efficient, stable and biocompatible photothermal cancer therapy. J Mater Chem B 2017; 5:7393-7402. [DOI: 10.1039/c7tb01832k] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The synthesized MoO2 nanocrystals exhibit excellent photothermal temperature elevation of about 37.5 °C under 808 nm laser irradiation, and tumor inhibition effects with an inhibition rate of up to 80.45% as a photothermal therapy agent against 4T1 cancer cells.
Collapse
Affiliation(s)
- Kang Dou
- MIIT Key Laboratory of Advanced Display Materials and Devices
- Institute of Optoelectronics & Nanomaterials
- School of Materials Science and Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
| | - Wenwen Zhu
- Institute of Functional Nano & Soft Materials Laboratory (FUNSOM)
- Soochow University
- Suzhou 215123
- China
| | - Yousheng Zou
- MIIT Key Laboratory of Advanced Display Materials and Devices
- Institute of Optoelectronics & Nanomaterials
- School of Materials Science and Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
| | - Yu Gu
- MIIT Key Laboratory of Advanced Display Materials and Devices
- Institute of Optoelectronics & Nanomaterials
- School of Materials Science and Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
| | - Jubin Li
- MIIT Key Laboratory of Advanced Display Materials and Devices
- Institute of Optoelectronics & Nanomaterials
- School of Materials Science and Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
| | - Shengli Zhang
- MIIT Key Laboratory of Advanced Display Materials and Devices
- Institute of Optoelectronics & Nanomaterials
- School of Materials Science and Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
| | - Zhuang Liu
- Institute of Functional Nano & Soft Materials Laboratory (FUNSOM)
- Soochow University
- Suzhou 215123
- China
| | - Haibo Zeng
- MIIT Key Laboratory of Advanced Display Materials and Devices
- Institute of Optoelectronics & Nanomaterials
- School of Materials Science and Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
| |
Collapse
|
26
|
Boezeman RP, Moll FL, Ünlü Ç, de Vries JPP. Systematic review of clinical applications of monitoring muscle tissue oxygenation with near-infrared spectroscopy in vascular disease. Microvasc Res 2016; 104:11-22. [DOI: 10.1016/j.mvr.2015.11.004] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2015] [Revised: 10/07/2015] [Accepted: 11/10/2015] [Indexed: 10/22/2022]
|
27
|
MasoudiMotlagh M, Sugar JJ, Azimipour M, Linz WW, Michalak G, Seo NJ, Ranji M. Monitoring hemodynamic changes in stroke-affected muscles using near-infrared spectroscopy. J Rehabil Assist Technol Eng 2015; 2:2055668315614195. [PMID: 31191919 PMCID: PMC6531806 DOI: 10.1177/2055668315614195] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The oxygenation level of a tissue is an important marker of the health of the
tissue and has a direct effect on performance. It has been shown that the blood
flow to the paretic muscles of hemiparetic post-stroke patients is significantly
reduced compared to non-paretic muscles. It is hypothesized that hemodynamic
activity in paretic muscles is suppressed as compared to non-paretic muscles,
and that oximetry can be used to measure this disparity in real-time. In order
to test this hypothesis, a custom-made oximetry device was used to measure
hemodynamic activity in the forearm extensor muscles in post-stroke patients’
paretic and non-paretic sides and in a control population during three exercise
levels calibrated to the subject’s maximum effort. The change in oxygenation
(ΔOxy) and blood volume (ΔBV) were
calculated and displayed in real-time. Results show no apparent difference in
either ΔOxy or ΔBV between control subjects’
dominant and non-dominant muscles. However, the results show a significant
difference in ΔOxy between paretic and non-paretic muscles, as
well as a significant difference between normalized post-stroke and control
data. Further work will be necessary to determine if the observed difference
between the paretic and non-paretic muscles changes over the course of physical
therapy and can be correlated with functional improvements.
Collapse
Affiliation(s)
- Mohammad MasoudiMotlagh
- Department of Electrical Engineering and Computer Science, University of Wisconsin-Milwaukee, USA
| | - Jeffrey J Sugar
- Department of Electrical Engineering and Computer Science, University of Wisconsin-Milwaukee, USA
| | - Mehdi Azimipour
- Department of Electrical Engineering and Computer Science, University of Wisconsin-Milwaukee, USA
| | - Whitney W Linz
- Department of Electrical Engineering and Computer Science, University of Wisconsin-Milwaukee, USA
| | - Gregory Michalak
- Department of Electrical Engineering and Computer Science, University of Wisconsin-Milwaukee, USA
| | - Na Jin Seo
- Division of Occupational Therapy, Department of Health Professions, Department of Health Sciences and Research, Medical University of South Carolina
| | - Mahsa Ranji
- Department of Electrical Engineering and Computer Science, University of Wisconsin-Milwaukee, USA
| |
Collapse
|
28
|
Wang H, Sun Y, Yi J, Fu J, Di J, del Carmen Alonso A, Zhou S. Fluorescent porous carbon nanocapsules for two-photon imaging, NIR/pH dual-responsive drug carrier, and photothermal therapy. Biomaterials 2015; 53:117-26. [DOI: 10.1016/j.biomaterials.2015.02.087] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2014] [Revised: 02/13/2015] [Accepted: 02/19/2015] [Indexed: 01/08/2023]
|
29
|
Wang H, Cao G, Gai Z, Hong K, Banerjee P, Zhou S. Magnetic/NIR-responsive drug carrier, multicolor cell imaging, and enhanced photothermal therapy of gold capped magnetite-fluorescent carbon hybrid nanoparticles. NANOSCALE 2015; 7:7885-7895. [PMID: 25854197 DOI: 10.1039/c4nr07335e] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This paper reports a type of multifunctional hybrid nanoparticle (NP) composed of gold nanocrystals coated on and/or embedded in a magnetite-fluorescent porous carbon core-shell NP template (Fe3O4@PC-CDs-Au) for biomedical applications, including magnetic/NIR-responsive drug release, multicolor cell imaging, and enhanced photothermal therapy. The synthesis of the Fe3O4@PC-CDs-Au NPs firstly involves the preparation of core-shell template NPs with magnetite nanocrystals clustered in the cores and fluorescent carbon dots (CDs) embedded in a porous carbon shell, followed by an in situ reduction of silver ions (Ag(+)) loaded in the porous carbon shell and a subsequent replacement of Ag NPs with Au NPs through a galvanic replacement reaction using HAuCl4 as a precursor. The Fe3O4@PC-CDs-Au NPs can enter the intracellular region and light up mouse melanoma B16F10 cells in multicolor mode. The porous carbon shell, anchored with hydrophilic hydroxyl/carboxyl groups, endows the Fe3O4@PC-CDs-Au NPs with excellent stability in the aqueous phase and a high loading capacity (719 mg g(-1)) for the anti-cancer drug doxorubicin (DOX). The superparamagnetic Fe3O4@PC-CDs-Au NPs with a saturation magnetization of 23.26 emu g(-1) produce localized heat under an alternating magnetic field, which triggers the release of the loaded drug. The combined photothermal effects of the Au nanocrystals and the CDs on/in the carbon shell can not only regulate the release rate of the loaded drug, but also efficiently kill tumor cells under NIR irradiation. Benefitting from their excellent optical properties, their magnetic field and NIR light-responsive drug release capabilities and their enhanced photothermal effect, such nanostructured Fe3O4@PC-CDs-Au hybrid NPs are very promising for simultaneous imaging diagnostics and high efficacy therapy.
Collapse
Affiliation(s)
- Hui Wang
- Department of Chemistry, The College of Staten Island, and The Graduate Center, The City University of New York, Staten Island, NY 10314, USA.
| | | | | | | | | | | |
Collapse
|
30
|
Wang H, Yi J, Mukherjee S, Banerjee P, Zhou S. Magnetic/NIR-thermally responsive hybrid nanogels for optical temperature sensing, tumor cell imaging and triggered drug release. NANOSCALE 2014; 6:13001-13011. [PMID: 25243783 DOI: 10.1039/c4nr03748k] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The paper demonstrates a class of multifunctional core-shell hybrid nanogels with fluorescent and magnetic properties, which have been successfully developed for simultaneous optical temperature sensing, tumor cell imaging and magnetic/NIR-thermally responsive drug carriers. The as-synthesized hybrid nanogels were designed by coating bifunctional nanoparticles (BFNPs, fluorescent carbon dots embedded in the porous carbon shell and superparamagnetic iron oxide nanocrystals clustered in the core) with a thermo-responsive poly(N-isopropylacrylamide-co-acrylamide) [poly(NIPAM-AAm)]-based hydrogel as the shell. The BFNPs in hybrid nanogels not only demonstrate excellent photoluminescence (PL) and photostability due to the fluorescent carbon dots embedded in the porous carbon shell, but also has targeted drug accumulation potential and a magnetic-thermal conversion ability due to the superparamagnetic iron oxide nanocrystals clustered in the core. The thermo-responsive poly(NIPAM-AAm)-based gel shell can not only modify the physicochemical environment of the BFNPs core to manipulate the fluorescence intensity for sensing the variation of the environmental temperature, but also regulate the release rate of the loaded anticancer drug (curcumin) by varying the local temperature of environmental media. In addition, the carbon layer of BFNPs can adsorb and convert the NIR light to heat, leading to a promoted drug release under NIR irradiation and improving the therapeutic efficacy of drug-loaded hybrid nanogels. Furthermore, the superparamagnetic iron oxide nanocrystals in the core of BFNPs can trigger localized heating using an alternating magnetic field, leading to a phase change in the polymer gel to trigger the release of loaded drugs. Finally, the multifunctional hybrid nanogels can overcome cellular barriers to enter the intracellular region and light up the mouse melanoma B16F10 cells. The demonstrated hybrid nanogels would be an ideal system for the biomedical applications due to their excellent optical properties, magnetic properties, high drug loading capacity and responsive drug release behavior.
Collapse
Affiliation(s)
- Hui Wang
- Department of Chemistry, The College of Staten Island, and The Graduate Center, The City University of New York, Staten Island, NY 10314, USA.
| | | | | | | | | |
Collapse
|
31
|
Kopton IM, Kenning P. Near-infrared spectroscopy (NIRS) as a new tool for neuroeconomic research. Front Hum Neurosci 2014; 8:549. [PMID: 25147517 PMCID: PMC4124877 DOI: 10.3389/fnhum.2014.00549] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2014] [Accepted: 07/07/2014] [Indexed: 11/23/2022] Open
Abstract
Over the last decade, the application of neuroscience to economic research has gained in importance and the number of neuroeconomic studies has grown extensively. The most common method for these investigations is fMRI. However, fMRI has limitations (particularly concerning situational factors) that should be countered with other methods. This review elaborates on the use of functional Near-Infrared Spectroscopy (fNIRS) as a new and promising tool for investigating economic decision making both in field experiments and outside the laboratory. We describe results of studies investigating the reliability of prototype NIRS studies, as well as detailing experiments using conventional and stationary fNIRS devices to analyze this potential. This review article shows that further research using mobile fNIRS for studies on economic decision making outside the laboratory could be a fruitful avenue helping to develop the potential of a new method for field experiments outside the laboratory.
Collapse
Affiliation(s)
- Isabella M Kopton
- Department of Corporate Management and Economics, Zeppelin Universität Friedrichshafen, Germany
| | - Peter Kenning
- Department of Corporate Management and Economics, Zeppelin Universität Friedrichshafen, Germany ; Faculty of Business Administration and Economics, Heinrich-Heine-Universität Düsseldorf, Germany
| |
Collapse
|
32
|
Wang H, Ke F, Mararenko A, Wei Z, Banerjee P, Zhou S. Responsive polymer-fluorescent carbon nanoparticle hybrid nanogels for optical temperature sensing, near-infrared light-responsive drug release, and tumor cell imaging. NANOSCALE 2014; 6:7443-7452. [PMID: 24881520 DOI: 10.1039/c4nr01030b] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Fluorescent carbon nanoparticles (FCNPs) have been successfully immobilized into poly(N-isopropylacrylamide-co-acrylamide) [poly(NIPAM-AAm)] nanogels based on one-pot precipitation copolymerization of NIPAM monomers with hydrogen bonded FCNP-AAm complex monomers in water. The resultant poly(NIPAM-AAm)-FCNP hybrid nanogels can combine functions from each building block for fluorescent temperature sensing, cell imaging, and near-infrared (NIR) light responsive drug delivery. The FCNPs in the hybrid nanogels not only emit bright and stable photoluminescence (PL) and exhibit up-conversion PL properties, but also increase the loading capacity of the nanogels for curcumin drug molecules. The reversible thermo-responsive swelling/shrinking transition of the poly(NIPAM-AAm) nanogel can not only modify the physicochemical environment of the FCNPs to manipulate the PL intensity for sensing the environmental temperature change, but also regulate the releasing rate of the loaded anticancer drug. In addition, the FCNPs embedded in the nanogels can convert the NIR light to heat, thus an exogenous NIR irradiation can further accelerate the drug release and enhance the therapeutic efficacy. The hybrid nanogels can overcome cellular barriers to enter the intracellular region and light up the mouse melanoma B16F10 cells upon laser excitation. The demonstrated hybrid nanogels with nontoxic and optically active FCNPs immobilized in responsive polymer nanogels are promising for the development of a new generation of multifunctional materials for biomedical applications.
Collapse
Affiliation(s)
- Hui Wang
- Department of Chemistry, The College of Staten Island, and The Graduate Center, The City University of New York, Staten Island, NY 10314, USA.
| | | | | | | | | | | |
Collapse
|
33
|
Tran TN, Yamamoto K, Namita T, Kato Y, Shimizu K. Three-dimensional transillumination image reconstruction for small animal with new scattering suppression technique. BIOMEDICAL OPTICS EXPRESS 2014; 5:1321-35. [PMID: 24876998 PMCID: PMC4026888 DOI: 10.1364/boe.5.001321] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Revised: 03/06/2014] [Accepted: 03/07/2014] [Indexed: 06/03/2023]
Abstract
To realize three-dimensional (3D) optical imaging of the internal structure of an animal body, we have developed a new technique to reconstruct optical computed tomography (optical CT) images from two-dimensional (2D) transillumination images. In transillumination imaging of an animal body using near-infrared light, the image is blurred because of the strong scattering in the tissue. To overcome this problem, we propose a novel technique to apply the point spread function (PSF) for a light source located inside the medium to the transilluminated image of light-absorbing structure. The problem of the depth-dependence of PSF was solved in the calculation of the projection image in the filtered back-projection method. The effectiveness of the proposed technique was assessed in the experiments with a model phantom and a mouse. These analyses verified the feasibility of the practical 3D imaging of the internal light-absorbing structure of a small animal.
Collapse
Affiliation(s)
- Trung Nghia Tran
- Graduate School of Information Science and Technology, Hokkaido University, North 14 West 9, Kita-ku, Sapporo 060-0814, Japan
| | - Kohei Yamamoto
- Graduate School of Information Science and Technology, Hokkaido University, North 14 West 9, Kita-ku, Sapporo 060-0814, Japan
| | - Takeshi Namita
- Graduate School of Information Science and Technology, Hokkaido University, North 14 West 9, Kita-ku, Sapporo 060-0814, Japan
- Currently with the Graduate School of Medicine, Kyoto University, 53 Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Yuji Kato
- Graduate School of Information Science and Technology, Hokkaido University, North 14 West 9, Kita-ku, Sapporo 060-0814, Japan
| | - Koichi Shimizu
- Graduate School of Information Science and Technology, Hokkaido University, North 14 West 9, Kita-ku, Sapporo 060-0814, Japan
| |
Collapse
|
34
|
Hannah A, Luke G, Wilson K, Homan KA, Emelianov S. Indocyanine green-loaded photoacoustic nanodroplets: dual contrast nanoconstructs for enhanced photoacoustic and ultrasound imaging. ACS NANO 2014; 8:250-9. [PMID: 24303934 PMCID: PMC3916902 DOI: 10.1021/nn403527r] [Citation(s) in RCA: 162] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Recently, perfluorocarbon (PFC) nanodroplets were introduced as contrast agents for imaging and image-guided therapy. For example, in sonography, high-intensity ultrasound pulses were used to phase-transition liquid perfluorocarbon to produce gas microbubbles. More recently, perfluorocarbon nanodroplets with encapsulated gold nanorods were used as dual ultrasound/photoacoustic contrast agents. To expedite clinical translation, we synthesized and characterized ICG-loaded perfluorocarbon nanodroplets, i.e., constructs comprising biocompatible, nontoxic and biologically safe materials. We then demonstrated enhanced photoacoustic contrast through optically triggered phase transition of PFC nanodroplets and ultrasound contrast from the resulting PFC bubbles. We assessed the quality enhancement of photoacoustic and ultrasound images through analysis of contrast and contrast-to-noise ratio. We further investigated the changes in image contrast due to increased ambient temperature. Our studies suggest that ICG-loaded perfluorocarbon nanodroplets may become a valuable tool for various imaging modalities, and have promising therapeutic applications.
Collapse
Affiliation(s)
| | | | | | | | - Stanislav Emelianov
- Corresponding Author, , Mailing Address: 107 W Dean Keeton Stop C0800, Austin, TX 78712
| |
Collapse
|
35
|
Byrne WL, DeLille A, Kuo C, de Jong JS, van Dam GM, Francis KP, Tangney M. Use of optical imaging to progress novel therapeutics to the clinic. J Control Release 2013; 172:523-34. [PMID: 23680286 DOI: 10.1016/j.jconrel.2013.05.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2013] [Revised: 04/30/2013] [Accepted: 05/06/2013] [Indexed: 01/02/2023]
Abstract
There is an undisputed need for employment and improvement of robust technology for real-time analyses of therapeutic delivery and responses in clinical translation of gene and cell therapies. Over the past decade, optical imaging has become the in vivo imaging modality of choice for many preclinical laboratories due to its efficiency, practicality and affordability, while more recently, the clinical potential for this technology is becoming apparent. This review provides an update on the current state of the art in in vivo optical imaging and discusses this rapidly improving technology in the context of it representing a translation enabler or indeed a future clinical imaging modality in its own right.
Collapse
Affiliation(s)
- William L Byrne
- Cork Cancer Research Centre, BioScience Institute, University College Cork, Cork, Ireland
| | | | | | | | | | | | | |
Collapse
|
36
|
Chou SS, Kaehr B, Kim J, Foley BM, De M, Hopkins PE, Huang J, Brinker CJ, Dravid VP. Chemically Exfoliated MoS2as Near-Infrared Photothermal Agents. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201209229] [Citation(s) in RCA: 140] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
37
|
Chou SS, Kaehr B, Kim J, Foley BM, De M, Hopkins PE, Huang J, Brinker CJ, Dravid VP. Chemically exfoliated MoS2 as near-infrared photothermal agents. Angew Chem Int Ed Engl 2013; 52:4160-4. [PMID: 23471666 DOI: 10.1002/anie.201209229] [Citation(s) in RCA: 425] [Impact Index Per Article: 38.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2012] [Revised: 02/14/2013] [Indexed: 11/10/2022]
Affiliation(s)
- Stanley S Chou
- Department of Materials Science and Engineering, International Institute of Nanotechnology, Northwestern University, Evanston, IL 60208, USA.
| | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Quaresima V, Bisconti S, Ferrari M. A brief review on the use of functional near-infrared spectroscopy (fNIRS) for language imaging studies in human newborns and adults. BRAIN AND LANGUAGE 2012; 121:79-89. [PMID: 21507474 DOI: 10.1016/j.bandl.2011.03.009] [Citation(s) in RCA: 151] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2010] [Revised: 01/20/2011] [Accepted: 03/21/2011] [Indexed: 05/03/2023]
Abstract
Upon stimulation, real time maps of cortical hemodynamic responses can be obtained by non-invasive functional near-infrared spectroscopy (fNIRS) which measures changes in oxygenated and deoxygenated hemoglobin after positioning multiple sources and detectors over the human scalp. The current commercially available transportable fNIRS systems have a time resolution of 1-10 Hz, a depth sensitivity of about 1.5 cm, and a spatial resolution of about 1cm. The goal of this brief review is to report infants, children and adults fNIRS language studies. Since 1998, 60 studies have been published on cortical activation in the brain's classic language areas in children/adults as well as newborns using fNIRS instrumentations of different complexity. In addition, the basic principles of fNIRS including features, strengths, advantages, and limitations are summarized in terms that can be understood even by non specialists. Future prospects of fNIRS in the field of language processing imaging are highlighted.
Collapse
Affiliation(s)
- Valentina Quaresima
- Department of Health Sciences, University of L'Aquila, Via Vetoio, 67100 L'Aquila, Italy.
| | | | | |
Collapse
|
39
|
Ferrari M, Quaresima V. A brief review on the history of human functional near-infrared spectroscopy (fNIRS) development and fields of application. Neuroimage 2012; 63:921-35. [PMID: 22510258 DOI: 10.1016/j.neuroimage.2012.03.049] [Citation(s) in RCA: 1089] [Impact Index Per Article: 90.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2011] [Revised: 02/21/2012] [Accepted: 03/16/2012] [Indexed: 12/14/2022] Open
Abstract
This review is aimed at celebrating the upcoming 20th anniversary of the birth of human functional near-infrared spectroscopy (fNIRS). After the discovery in 1992 that the functional activation of the human cerebral cortex (due to oxygenation and hemodynamic changes) can be explored by NIRS, human functional brain mapping research has gained a new dimension. fNIRS or optical topography, or near-infrared imaging or diffuse optical imaging is used mainly to detect simultaneous changes in optical properties of the human cortex from multiple measurement sites and displays the results in the form of a map or image over a specific area. In order to place current fNIRS research in its proper context, this paper presents a brief historical overview of the events that have shaped the present status of fNIRS. In particular, technological progresses of fNIRS are highlighted (i.e., from single-site to multi-site functional cortical measurements (images)), introduction of the commercial multi-channel systems, recent commercial wireless instrumentation and more advanced prototypes.
Collapse
Affiliation(s)
- Marco Ferrari
- Department of Health Sciences, University of L'Aquila, L'Aquila, Italy.
| | | |
Collapse
|
40
|
Qin Z, Bischof JC. Thermophysical and biological responses of gold nanoparticle laser heating. Chem Soc Rev 2012; 41:1191-217. [DOI: 10.1039/c1cs15184c] [Citation(s) in RCA: 433] [Impact Index Per Article: 36.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
41
|
Chung SH. Diffuse Optical Technology: A Portable and Simple Method for Noninvasive Tissue Pathophysiology. PET Clin 2012; 7:127-31. [PMID: 23658534 DOI: 10.1016/j.cpet.2011.12.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
42
|
Durduran T, Choe R, Baker WB, Yodh AG. Diffuse Optics for Tissue Monitoring and Tomography. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2010; 73:076701. [PMID: 26120204 PMCID: PMC4482362 DOI: 10.1088/0034-4885/73/7/076701] [Citation(s) in RCA: 571] [Impact Index Per Article: 40.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
This review describes the diffusion model for light transport in tissues and the medical applications of diffuse light. Diffuse optics is particularly useful for measurement of tissue hemodynamics, wherein quantitative assessment of oxy- and deoxy-hemoglobin concentrations and blood flow are desired. The theoretical basis for near-infrared or diffuse optical spectroscopy (NIRS or DOS, respectively) is developed, and the basic elements of diffuse optical tomography (DOT) are outlined. We also discuss diffuse correlation spectroscopy (DCS), a technique whereby temporal correlation functions of diffusing light are transported through tissue and are used to measure blood flow. Essential instrumentation is described, and representative brain and breast functional imaging and monitoring results illustrate the workings of these new tissue diagnostics.
Collapse
Affiliation(s)
- T Durduran
- ICFO- Institut de Ciències Fotòniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain
| | - R Choe
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - W B Baker
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - A G Yodh
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USA
| |
Collapse
|
43
|
Lloyd-Fox S, Blasi A, Elwell C. Illuminating the developing brain: The past, present and future of functional near infrared spectroscopy. Neurosci Biobehav Rev 2010; 34:269-84. [DOI: 10.1016/j.neubiorev.2009.07.008] [Citation(s) in RCA: 586] [Impact Index Per Article: 41.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2009] [Revised: 07/15/2009] [Accepted: 07/16/2009] [Indexed: 11/24/2022]
|
44
|
Bornstein E, Hermans W, Gridley S, Manni J. Near-infrared photoinactivation of bacteria and fungi at physiologic temperatures. Photochem Photobiol 2010; 85:1364-74. [PMID: 19709379 DOI: 10.1111/j.1751-1097.2009.00615.x] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We examined a laser system (870 and 930 nm), employing wavelengths that have exhibited cellular photodamage properties in optical traps. In vitro, with 1.5 cm diameter flat-top projections (power density of 5.66 W cm(-2)), at physiologic temperatures, we achieved photoinactivation of Staphylococcus aureus, Escherichia coli, Candida albicans and Trichophyton rubrum. Using nonlethal dosimetry, we measured a decrease in trans-membrane potentials (DeltaPsimt and DeltaPsip) and an increase in reactive oxygen species (ROS) generation in methicillin-resistant S. aureus (MRSA), C. albicans and human embryonic kidney cells. We postulate that these multiplexed wavelengths cause an optically mediated mechano-transduction of cellular redox pathways, decreasing DeltaPsi and increasing ROS. The cellular energetics of prokaryotic and fungal pathogens, along with mammalian cells, are affected in a similar manner when treated with these multiplexed wavelengths at the power densities employed. Following live porcine thermal tolerance skin experiments, we then performed human pilot studies, examining photodamage to MRSA in the nose and fungi in onychomycosis. No observable damage to the nares or the nail matrix was observed, yet photodamage to the pathogens was achieved at physiologic temperatures. The selective aspect of this near-infrared photodamage presents the possibility for its future utilization in human cutaneous antimicrobial therapy.
Collapse
|
45
|
Gibson A, Dehghani H. Diffuse optical imaging. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2009; 367:3055-72. [PMID: 19581255 DOI: 10.1098/rsta.2009.0080] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Diffuse optical imaging is a medical imaging technique that is beginning to move from the laboratory to the hospital. It is a natural extension of near-infrared spectroscopy (NIRS), which is now used in certain niche applications clinically and particularly for physiological and psychological research. Optical imaging uses sophisticated image reconstruction techniques to generate images from multiple NIRS measurements. The two main clinical applications--functional brain imaging and imaging for breast cancer--are reviewed in some detail, followed by a discussion of other issues such as imaging small animals and multimodality imaging. We aim to review the state of the art of optical imaging.
Collapse
Affiliation(s)
- Adam Gibson
- Department of Medical Physics and Bioengineering, University College London, London WC1E 6BT, UK.
| | | |
Collapse
|
46
|
Hamaoka T, McCully KK, Quaresima V, Yamamoto K, Chance B. Near-infrared spectroscopy/imaging for monitoring muscle oxygenation and oxidative metabolism in healthy and diseased humans. JOURNAL OF BIOMEDICAL OPTICS 2007; 12:062105. [PMID: 18163808 DOI: 10.1117/1.2805437] [Citation(s) in RCA: 222] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Near-infrared spectroscopy (NIRS) was initiated in 1977 by Jobsis as a simple, noninvasive method for measuring the presence of oxygen in muscle and other tissues in vivo. This review honoring Jobsis highlights the progress that has been made in developing and adapting NIRS and NIR imaging (NIRI) technologies for evaluating skeletal muscle O(2) dynamics and oxidative energy metabolism. Development of NIRS/NIRI technologies has included novel approaches to quantification of the signal, as well as the addition of multiple source detector pairs for imaging. Adaptation of NIRS technology has focused on the validity and reliability of NIRS measurements. NIRS measurements have been extended to resting, ischemic, localized exercise, and whole body exercise conditions. In addition, NIRS technology has been applied to the study of a number of chronic health conditions, including patients with chronic heart failure, peripheral vascular disease, chronic obstructive pulmonary disease, varying muscle diseases, spinal cord injury, and renal failure. As NIRS technology continues to evolve, the study of skeletal muscle function with NIRS first illuminated by Jobsis continues to be bright.
Collapse
Affiliation(s)
- Takafumi Hamaoka
- National Institute of Fitness and Sports, Department of Exercise Science, Shiromizu 1, Kanoya, 891-2393 Japan.
| | | | | | | | | |
Collapse
|
47
|
Piantadosi CA. Early development of near-infrared spectroscopy at Duke University. JOURNAL OF BIOMEDICAL OPTICS 2007; 12:062102. [PMID: 18163805 DOI: 10.1117/1.2804925] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Optical monitoring of living tissues in the near-infrared (NIR) region of the spectrum (700 to 1300 nm) was first demonstrated some 30 years ago by Professor Frans F. Jobsis of Duke University. Jobsis had intended to study the oxidation-reduction (redox) behavior of the copper band (CuA) of cytochrome c oxidase (cyt a,a(3)) to understand certain anomalies in the behavior of the mitochondrial respiratory chain in the ultraviolet and visible regions between living tissue and isolated preparations of mitochondria. Instead, he discovered a new window into the body-for NIR light penetrates deeply into living tissues. Jobsis's pioneering studies proved it was possible to interrogate hemoglobin absorption and saturation and to assess the redox state of vital organs such as the brain directly through skin and bone. He and his collaborators had also recognized that the tissue hemoglobin signals provided valuable information about the oxygen (O(2)) content of the tissue, and cyt a,a(3) signaled the availability of cellular O(2) for oxidative phosphorylation. The ability to noninvasively monitor the O(2) delivery-uptake relationship has made NIR spectroscopy a unique tool for the assessment of tissue oxygen sufficiency in health and disease.
Collapse
|
48
|
Wolf M, Ferrari M, Quaresima V. Progress of near-infrared spectroscopy and topography for brain and muscle clinical applications. JOURNAL OF BIOMEDICAL OPTICS 2007; 12:062104. [PMID: 18163807 DOI: 10.1117/1.2804899] [Citation(s) in RCA: 301] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
This review celebrates the 30th anniversary of the first in vivo near-infrared (NIR) spectroscopy (NIRS) publication, which was authored by Professor Frans Jobsis. At first, NIRS was utilized to experimentally and clinically investigate cerebral oxygenation. Later it was applied to study muscle oxidative metabolism. Since 1993, the discovery that the functional activation of the human cerebral cortex can be explored by NIRS has added a new dimension to the research. To obtain simultaneous multiple and localized information, a further major step forward was achieved by introducing NIR imaging (NIRI) and tomography. This review reports on the progress of the NIRS and NIRI instrumentation for brain and muscle clinical applications 30 years after the discovery of in vivo NIRS. The review summarizes the measurable parameters in relation to the different techniques, the main characteristics of the prototypes under development, and the present commercially available NIRS and NIRI instrumentation. Moreover, it discusses strengths and limitations and gives an outlook into the "bright" future.
Collapse
Affiliation(s)
- Martin Wolf
- University Hospital Zurich, Clinic of Neonatology, Biomedical Optics Research Laboratory, 8091 Zurich, Switzerland.
| | | | | |
Collapse
|
49
|
LaManna JC. In situ measurements of brain tissue hemoglobin saturation and blood volume by reflectance spectrophotometry in the visible spectrum. JOURNAL OF BIOMEDICAL OPTICS 2007; 12:062103. [PMID: 18163806 DOI: 10.1117/1.2804184] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Before the development of near-infrared spectroscopy (NIRS) for monitoring of hemoglobin and cytochromes in situ, the Jobsis laboratory designed a visible light reflectance spectrophotometer. The method was not as useful for cytochrome oxidase measurements, which stimulated the search for a better method that culminated in NIRS. Visible light reflectance spectrophotomery was, however, usefully applied in several experimental applications, such as the study of brain capillary hemoglobin saturation during changes in inspired gas mixtures in awake and anesthetized animals, and to record transient increases in total hemoglobin (blood volume) after local neuronal activation by direct cortical electrical stimulation, demonstrating a response that is fundamental to functional magnetic resonance imaging blood oxygen level-dependent methods. A third application of the instrumentation was for brain capillary red cell mean transit time analysis, estimated by recording the passage of a red cell-free bolus through the cerebral cortical optical monitoring field. Taken together with his previous application of fluorescence detection of nicotinamide adenine dinucleotide, the visible and near-infrared spectroscopy demonstrate that Frans Jobsis was a pioneer in the application of optical techniques to the study of intact organs in situ. These methods have been used to illuminate the basic function of the cerebrovascular and metabolic pathways in both physiological and pathological conditions.
Collapse
Affiliation(s)
- Joseph C LaManna
- Case Western University School of Medicine, Department of Anatomy, 10900 Euclid Avenue, Cleveland, Ohio 44106, USA.
| |
Collapse
|
50
|
Mi XQ, Chen JY, Zhou LW. Effect of low power laser irradiation on disconnecting the membrane-attached hemoglobin from erythrocyte membrane. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2006; 83:146-50. [PMID: 16481193 DOI: 10.1016/j.jphotobiol.2005.12.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2005] [Revised: 12/14/2005] [Accepted: 12/30/2005] [Indexed: 10/25/2022]
Abstract
In our previous study we found that low power laser irradiation improved the erythrocyte deformability, but the mechanism is unclear. The membrane-attached hemoglobin (Hbm) may be one of the determining factors for the erythrocyte deformability. We report here for the first time, that laser irradiation can reduce the Hbm contents in pig's erythrocytes, providing the explanation for the improvement of erythrocyte deformability. The decrease of the Hbm was proportional to the irradiation dose, but the relative change of Hbm was saturated around 35%. The 532 nm laser was more efficient at lowering Hbm than the 632.8 nm laser, consistent with the absorption spectrum of Hbm.
Collapse
Affiliation(s)
- X Q Mi
- Department of Physics, Fudan University, Shanghai 200433, China; State Key Laboratory of Applied Surface Physics, Fudan University, Shanghai, China
| | | | | |
Collapse
|