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Li Y, Li W, Zhang X, Lin H, Li D, Li Z. Three-dimensional morphological characterization of blood droplets during the dynamic coagulation process. JOURNAL OF BIOPHOTONICS 2024; 17:e202400116. [PMID: 38887206 DOI: 10.1002/jbio.202400116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 05/01/2024] [Accepted: 05/03/2024] [Indexed: 06/20/2024]
Abstract
In this study, we employed a method integrating optical coherence tomography (OCT) with the U-Net and Visual Geometry Group (VGG)-Net frameworks within a convolutional neural network for quantitative characterization of the three dimensional whole blood during the dynamic coagulation process. VGG-Net architecture for the identification of blood droplets across three distinct coagulation stages including drop, gelation, and coagulation achieves an accuracy of up to 99%. In addition, the U-Net architecture demonstrated proficiency in effectively segmenting uncoagulated and coagulated portions of whole blood, as well as the background. Notably, parameters such as volume of uncoagulated and coagulated segments of the whole blood were successfully employed for the precise quantification of the coagulation process, which indicates well for the potential of future clinical diagnostics and analyses.
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Affiliation(s)
- Yao Li
- Key Laboratory of Optoelectronic Science and Technology for Medicine, Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Provincial Engineering Technology Research Center of Photoelectric Sensing Application, College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou, Fujian, China
| | - Wangbiao Li
- Key Laboratory of Optoelectronic Science and Technology for Medicine, Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Provincial Engineering Technology Research Center of Photoelectric Sensing Application, College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou, Fujian, China
| | - Xiaoman Zhang
- Key Laboratory of Optoelectronic Science and Technology for Medicine, Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Provincial Engineering Technology Research Center of Photoelectric Sensing Application, College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou, Fujian, China
| | - Hui Lin
- Key Laboratory of Optoelectronic Science and Technology for Medicine, Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Provincial Engineering Technology Research Center of Photoelectric Sensing Application, College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou, Fujian, China
| | - Dezi Li
- Key Laboratory of Intelligent Control Technology for Wuling-Mountain Ecological Agriculture in Hunan Province, Huaihua University, Huaihua, Hunan, China
| | - Zhifang Li
- Key Laboratory of Optoelectronic Science and Technology for Medicine, Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Provincial Engineering Technology Research Center of Photoelectric Sensing Application, College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou, Fujian, China
- The Internet of Things and Artificial Intelligence College, Fujian Polytechnic of Information Technology, Fuzhou, Fujian, China
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2
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Vergari M, Niccolini B, Pitocco D, Rizzi A, Ciasca G, de Spirito M, Gavioli L. Optical discrimination of pathological red blood cells. Biotechnol Bioeng 2024. [PMID: 38973124 DOI: 10.1002/bit.28798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2024] [Revised: 06/26/2024] [Accepted: 06/27/2024] [Indexed: 07/09/2024]
Abstract
Fast diagnostic methods are crucial to reduce the burden on healthcare systems. Currently, detection of diabetes complications such as neuropathy requires time-consuming approaches to observe the correlated red blood cells (RBCs) morphological changes. To tackle this issue, an optical analysis of RBCs in air was conducted in the 250-2500 nm range. The distinct oscillations present in the scattered and direct transmittance spectra have been analyzed with both Mie theory and anomalous diffraction approximation. The results provide information about the swelling at the ends of RBCs and directly relate the optical data to RBCs morphology and deformability. Both models agree on a reduction in the size and deformability of RBCs in diabetic patients, thus opening the way to diabetes diagnosis and disease progression assessment.
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Affiliation(s)
- Michele Vergari
- Interdisciplinary Laboratories for Advanced Materials Physics (i-LAMP) and Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore, Brescia, Italy
| | - Benedetta Niccolini
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica del Sacro Cuore, Fondazione Policlinico Universitario "A. Gemelli", IRCCS, Rome, Italy
| | - Dario Pitocco
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica del Sacro Cuore, Fondazione Policlinico Universitario "A. Gemelli", IRCCS, Rome, Italy
- UOSD Diabetologia, Fondazione Policlinico Universitario Agostino Gemelli, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Alessandro Rizzi
- UOSD Diabetologia, Fondazione Policlinico Universitario Agostino Gemelli, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Gabriele Ciasca
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica del Sacro Cuore, Fondazione Policlinico Universitario "A. Gemelli", IRCCS, Rome, Italy
- UOSD Diabetologia, Fondazione Policlinico Universitario Agostino Gemelli, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Marco de Spirito
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica del Sacro Cuore, Fondazione Policlinico Universitario "A. Gemelli", IRCCS, Rome, Italy
- UOSD Diabetologia, Fondazione Policlinico Universitario Agostino Gemelli, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Luca Gavioli
- Interdisciplinary Laboratories for Advanced Materials Physics (i-LAMP) and Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore, Brescia, Italy
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Omari F, Khaouane L, Laidi M, Ibrir A, Roubehie Fissa M, Hentabli M, Hanini S. Dragonfly algorithm-support vector machine approach for prediction the optical properties of blood. Comput Methods Biomech Biomed Engin 2024; 27:1119-1128. [PMID: 37376957 DOI: 10.1080/10255842.2023.2228957] [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: 03/21/2023] [Revised: 05/31/2023] [Accepted: 06/19/2023] [Indexed: 06/29/2023]
Abstract
Knowledge of the optical properties of blood plays important role in medical diagnostics and therapeutic applications in laser medicine. In this paper, we present a very rapid and accurate artificial intelligent approach using Dragonfly Algorithm/Support Vector Machine models to estimate the optical properties of blood, specifically the absorption coefficient, and the scattering coefficient using key parameters such as wavelength (nm), hematocrit percentage (%), and saturation of oxygen (%), in building very highly accurate Dragonfly Algorithm-Support Vector Regression models (DA-SVR). 1000 training and testing sets were selected in the wavelength range of 250-1200 nm and the hematocrit of 0-100%. The performance of the proposed method is characterized by high accuracy indicated in the correlation coefficients (R) of 0.9994 and 0.9957 for absorption and scattering coefficients, respectively. In addition, the root mean squared error values (RMSE) of 0.972 and 2.9193, as well as low mean absolute error values (MAE) of 0.2173 and 0.2423, this result showed a strong match with the experimental data. The models can be used to accurately predict the absorption and scattering coefficients of blood, and provide a reliable reference for future studies on the optical properties of human blood.
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Affiliation(s)
- Faiza Omari
- Laboratory of Biomaterials and Transport Phenomena (LBMTP), Yahia Fares University, Medea, Algeria
| | - Latifa Khaouane
- Laboratory of Biomaterials and Transport Phenomena (LBMTP), Yahia Fares University, Medea, Algeria
| | - Maamar Laidi
- Laboratory of Biomaterials and Transport Phenomena (LBMTP), Yahia Fares University, Medea, Algeria
| | - Abdellah Ibrir
- Laboratory of Biomaterials and Transport Phenomena (LBMTP), Yahia Fares University, Medea, Algeria
- Materials and Environment Laboratory (LME), Faculty of Technology, Yahia Fares University, Medea, Algeria
| | - Mohamed Roubehie Fissa
- Laboratory of Biomaterials and Transport Phenomena (LBMTP), Yahia Fares University, Medea, Algeria
| | - Mohamed Hentabli
- Laboratory of Biomaterials and Transport Phenomena (LBMTP), Yahia Fares University, Medea, Algeria
- Quality Control Laboratory, SAIDAL Complex of Medea, Medea, Algeria
| | - Salah Hanini
- Laboratory of Biomaterials and Transport Phenomena (LBMTP), Yahia Fares University, Medea, Algeria
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Rodrigues IDFS, Guerreiro Cardoso PF, Nepomuceno da Silva NA, Correia AT, Minamoto H, Bibas BJ, Xavier Costa NDS, Mancini MW, Dolhnikoff M, Pego-Fernandes PM. Comparison between contact diode laser with 980 nm and 1470 nm wavelengths for posterior laryngofissure in pigs. Sci Rep 2024; 14:11457. [PMID: 38769365 PMCID: PMC11106238 DOI: 10.1038/s41598-024-62333-3] [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: 01/20/2024] [Accepted: 05/15/2024] [Indexed: 05/22/2024] Open
Abstract
To compare two different wavelengths of the surgical contact diode laser (CDL) for producing a posterior laryngofissure in in-vivo pigs. Anesthetized pigs underwent a tracheostomy and an anterior laryngofissure through a cervicotomy. They were randomly selected for the CDL wavelength and Power, according to the peak of Power set at device (980nm wavelength: Ppeak power of 10 W, 15 W, and 20 W, or 1470 nm wavelength: Ppeak 3 W, 5 W, 7 W, 10 W). At the end of the experiment, the laryngotracheal specimen was extracted and sent for histology and morphometry measurements (incision size, depth, area, and lateral thermal damage). Hemodynamic data and arterial blood gases were recorded during the incisions. Statistical analysis of the comparisons between the parameters and groups had a level of significance of p < 0.05. Twenty-six pigs were divided into CDL 980 nm (n = 11) and 1470 nm (n = 15). There was a greater incision area at the thyroid level in the 980 nm CDL and a wider incision at the trachea level, with a larger distance between mucosa borders. There were no significant differences in the area of lateral thermal damage between the two groups and neither difference among the power levels tested. Both wavelengths tested showed similar results in the various combinations of power levels without significant differences in the lateral thermal damage. The posterior laryngofissure incision can be performed by either of the wavelengths at low and medium power levels without great difference on lateral thermal damage.
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Affiliation(s)
- Isaac de Faria Soares Rodrigues
- Thoracic Surgery Research Laboratory (LIM-61), Division of Thoracic Surgery, Faculdade de Medicina, Instituto do Coracao, Hospital das Clinicas HCFMUSP, Universidade de Sao Paulo, Sao Paulo, SP, Brazil.
| | - Paulo Francisco Guerreiro Cardoso
- Thoracic Surgery Research Laboratory (LIM-61), Division of Thoracic Surgery, Faculdade de Medicina, Instituto do Coracao, Hospital das Clinicas HCFMUSP, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Natalia Aparecida Nepomuceno da Silva
- Thoracic Surgery Research Laboratory (LIM-61), Division of Thoracic Surgery, Faculdade de Medicina, Instituto do Coracao, Hospital das Clinicas HCFMUSP, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Aristides Tadeu Correia
- Thoracic Surgery Research Laboratory (LIM-61), Division of Thoracic Surgery, Faculdade de Medicina, Instituto do Coracao, Hospital das Clinicas HCFMUSP, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Helio Minamoto
- Thoracic Surgery Research Laboratory (LIM-61), Division of Thoracic Surgery, Faculdade de Medicina, Instituto do Coracao, Hospital das Clinicas HCFMUSP, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Benoit Jacques Bibas
- Thoracic Surgery Research Laboratory (LIM-61), Division of Thoracic Surgery, Faculdade de Medicina, Instituto do Coracao, Hospital das Clinicas HCFMUSP, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | | | - Marilia Wellichan Mancini
- Department of Biophotonics, Institute of Research and Education in the Health Area (NUPEN), Sao Carlos, SP, Brazil
| | - Marisa Dolhnikoff
- Departament of Pathology, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Paulo Manuel Pego-Fernandes
- Thoracic Surgery Research Laboratory (LIM-61), Division of Thoracic Surgery, Faculdade de Medicina, Instituto do Coracao, Hospital das Clinicas HCFMUSP, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
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Svoboda L, Sperrhake J, Nisser M, Taphorn L, Proquitté H. Contactless assessment of heart rate in neonates within a clinical environment using imaging photoplethysmography. Front Pediatr 2024; 12:1383120. [PMID: 38681773 PMCID: PMC11045999 DOI: 10.3389/fped.2024.1383120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Accepted: 04/01/2024] [Indexed: 05/01/2024] Open
Abstract
Introduction In neonatology, the accurate determination of vital parameters plays a pivotal role in monitoring critically ill newborns and premature infants, as well as aiding in disease diagnosis. In response to the limitations associated with contact-based measurement methods, substantial efforts have been directed toward developing contactless measurement techniques, particularly over the past decade. Methods Building upon the insights gained from our pilot study, we realized a new investigation to assess the precision of our imaging photoplethysmography-based system within a clinical environment of the neonatal intermediate care unit. We conducted measurements in 20 preterm infants or newborns requiring therapeutic interventions. As a point of reference, we employed a conventional pulse oximeter. To analytically predict measurement artifacts, we analyzed the potential influence of confounding factors, such as motion artifacts, illumination fluctuations (under- and overexposure), and loss of region of interest prior to heart rate evaluation. This reduced the amount of data we evaluated for heart rate to 56.1% of its original volume. Results In artifact-free time segments, the mean difference between the pulse oximetry and the imaging photoplethysmography-based system for 1 s sampling intervals resulted in -0.2 bpm (95% CI -0.8 to 0.4, LOA ± 12.2). For the clinical standard of 8 s averaging time, the mean difference resulted in -0.09 bpm (95% CI -0.7 to 0.6, LOA ± 10.1). These results match the medical standards. Discussion While further research is needed to increase the range of measurable vital parameters and more diverse patient collectives need to be considered in the future, we could demonstrate very high accuracy for non-contact heart rate measurement in newborn infants in the clinical setting, provided artifacts are excluded. In particular, performing a priori signal assessment helps make clinical measurements safer by identifying unreliable readings.
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Affiliation(s)
- Libor Svoboda
- Department of Pediatric and Adolescent Medicine, University Hospital Jena, Jena, Germany
| | | | | | - Luca Taphorn
- Department of Pediatric and Adolescent Medicine, University Hospital Jena, Jena, Germany
| | - Hans Proquitté
- Department of Pediatric and Adolescent Medicine, University Hospital Jena, Jena, Germany
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Xu K, Arbab MH. Terahertz polarimetric imaging of biological tissue: Monte Carlo modeling of signal contrast mechanisms due to Mie scattering. BIOMEDICAL OPTICS EXPRESS 2024; 15:2328-2342. [PMID: 38633080 PMCID: PMC11019684 DOI: 10.1364/boe.515623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 02/16/2024] [Accepted: 02/27/2024] [Indexed: 04/19/2024]
Abstract
Many promising biomedical applications have been proposed for terahertz (THz) spectroscopy and diagnostic imaging techniques. Polarimetric imaging systems are generally useful for enhancing imaging contrasts, yet the interplay between THz polarization changes and the random discrete structures in biological samples is not well understood. In this work, we performed Monte Carlo simulations of the propagation of polarized THz waves in skin and adipose tissues based on the Mie scattering from intrinsic structures, such as hair follicles or sweat glands. We show that the polarimetric contrasts are distinctly affected by concentration, size and dielectric properties of the scatterers, as well as the frequency and polarization of the incident THz waves. We describe the experimental requirements for observing and extracting these polarimetric signals due to the low energy and small angular spread of the back-scattered THz radiation. We analyzed the spatially integrated Mueller matrices of samples in the normal-incidence back-scattering geometry. We show that the frequency-dependent degree of polarization (DOP) can be used to infer the concentrations and dielectric contents of the scattering structures. Our modeling approach can be used to inform the design of the imaging modalities and the interpretation of the spectroscopic data in future terahertz biomedical imaging applications.
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Affiliation(s)
- Kuangyi Xu
- Department of Biomedical Engineering, State University of New York at Stony Brook, Stony Brook, New York 11794, USA
| | - M. Hassan Arbab
- Department of Biomedical Engineering, State University of New York at Stony Brook, Stony Brook, New York 11794, USA
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7
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Karabaliev M, Tacheva B, Paarvanova B, Georgieva R. Change in Osmotic Pressure Influences the Absorption Spectrum of Hemoglobin inside Red Blood Cells. Cells 2024; 13:589. [PMID: 38607028 PMCID: PMC11011345 DOI: 10.3390/cells13070589] [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: 02/29/2024] [Revised: 03/22/2024] [Accepted: 03/26/2024] [Indexed: 04/13/2024] Open
Abstract
Absorption spectra of red blood cell (RBC) suspensions are investigated in an osmolarity range in the medium from 200 mOsm to 900 mOsm. Three spectral parameters are used to characterize the process of swelling or shrinkage of RBC-the absorbance at 700 nm, the Soret peak height relative to the spectrum background, and the Soret peak wavelength. We show that with an increase in the osmolarity, the absorbance at 700 nm increases and the Soret peak relative height decreases. These changes are related to the changes in the RBC volume and the resulting increase in the hemoglobin intracellular concentration and index of refraction. Confocal microscopy and flow cytometry measurements supported these conclusions. The maximum wavelength of the Soret peak increases with increasing osmolarity due to changes in the oxygenation state of hemoglobin. Using these spectrum parameters, the process of osmosis in RBCs can be followed in real time, but it can also be applied to various processes, leading to changes in the volume and shape of RBCs. Therefore, we conclude that UV-Vis absorption spectrophotometry offers a convenient, easily accessible, and cost-effective method to monitor changes in RBC, which can find applications in the field of drug discovery and diagnostics of RBC and hemoglobin disorders.
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Affiliation(s)
- Miroslav Karabaliev
- Department of Physics and Biophysics, Faculty of Medicine, Trakia University, 11 Armeiska, 6000 Stara Zagora, Bulgaria; (B.T.); (B.P.)
| | - Bilyana Tacheva
- Department of Physics and Biophysics, Faculty of Medicine, Trakia University, 11 Armeiska, 6000 Stara Zagora, Bulgaria; (B.T.); (B.P.)
| | - Boyana Paarvanova
- Department of Physics and Biophysics, Faculty of Medicine, Trakia University, 11 Armeiska, 6000 Stara Zagora, Bulgaria; (B.T.); (B.P.)
| | - Radostina Georgieva
- Department of Physics and Biophysics, Faculty of Medicine, Trakia University, 11 Armeiska, 6000 Stara Zagora, Bulgaria; (B.T.); (B.P.)
- Institute of Transfusion Medicine, Charite-Universitatsrnedizin Berlin, Chariteplatz 1, 10117 Berlin, Germany
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Deng Y, Hu T, Chen J, Zeng J, Yang J, Ke Q, Miao L, Chen Y, Li R, Zhang R, Xu P. Non-invasive methods for heart rate measurement in fish based on photoplethysmography. J Exp Biol 2024; 227:jeb246464. [PMID: 38284767 DOI: 10.1242/jeb.246464] [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: 07/25/2023] [Accepted: 01/22/2024] [Indexed: 01/30/2024]
Abstract
Heart rate is a crucial physiological indicator for fish, but current measurement methods are often invasive or require delicate manipulation. In this study, we introduced two non-invasive and easy-to-operate methods based on photoplethysmography, namely reflectance-type photoplethysmography (PPG) and remote photoplethysmography (rPPG), which we applied to the large yellow croaker (Larimichthys crocea). PPG showed perfect synchronization with electrocardiogram (ECG), with a Pearson's correlation coefficient of 0.99999. For rPPG, the results showed good agreement with ECG. Under active provision of green light, the Pearson's correlation coefficient was 0.966, surpassing the value of 0.947 under natural light. Additionally, the root mean square error was 0.810, which was lower than the value of 1.30 under natural light, indicating not only that the rPPG method had relatively high accuracy but also that green light may have the potential to further improve its accuracy.
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Affiliation(s)
- Yacheng Deng
- State Key Laboratory of Mariculture Breeding, Xiamen University, Xiamen 361102, China
- Fujian Key Laboratory of Genetics and Breeding of Marine Organisms, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Tianyu Hu
- School of Electronic Science and Engineering (National Model Microelectronics College), Xiamen University, Xiamen 361005, China
- Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen 361005, China
| | - Jia Chen
- School of Electronic Science and Engineering (National Model Microelectronics College), Xiamen University, Xiamen 361005, China
- Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen 361005, China
| | - Junjia Zeng
- State Key Laboratory of Mariculture Breeding, Xiamen University, Xiamen 361102, China
- Fujian Key Laboratory of Genetics and Breeding of Marine Organisms, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Jinqian Yang
- School of Electronic Science and Engineering (National Model Microelectronics College), Xiamen University, Xiamen 361005, China
- Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen 361005, China
| | - Qiaozhen Ke
- State Key Laboratory of Mariculture Breeding, Xiamen University, Xiamen 361102, China
- Fujian Key Laboratory of Genetics and Breeding of Marine Organisms, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Lingwei Miao
- State Key Laboratory of Mariculture Breeding, Xiamen University, Xiamen 361102, China
- Fujian Key Laboratory of Genetics and Breeding of Marine Organisms, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Yujia Chen
- State Key Laboratory of Mariculture Breeding, Xiamen University, Xiamen 361102, China
- Fujian Key Laboratory of Genetics and Breeding of Marine Organisms, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Rui Li
- State Key Laboratory of Mariculture Breeding, Xiamen University, Xiamen 361102, China
- Fujian Key Laboratory of Genetics and Breeding of Marine Organisms, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Rongxin Zhang
- School of Electronic Science and Engineering (National Model Microelectronics College), Xiamen University, Xiamen 361005, China
- Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen 361005, China
| | - Peng Xu
- State Key Laboratory of Mariculture Breeding, Xiamen University, Xiamen 361102, China
- Fujian Key Laboratory of Genetics and Breeding of Marine Organisms, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
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9
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Gao M, Guo D, Wang J, Tan Y, Liu K, Gao L, Zhang Y, Ding Z, Gu Y, Li P. High-accuracy noninvasive continuous glucose monitoring using OCT angiography-purified blood scattering signals in human skin. BIOMEDICAL OPTICS EXPRESS 2024; 15:991-1003. [PMID: 38404306 PMCID: PMC10890863 DOI: 10.1364/boe.506092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 12/21/2023] [Accepted: 01/15/2024] [Indexed: 02/27/2024]
Abstract
The accuracy of noninvasive continuous glucose monitoring (CGM) through near-infrared scattering is challenged by mixed scattering signals from different compartments, where glucose has a positive correlation with a blood scattering coefficient but a negative correlation with a tissue scattering coefficient. In this study, we developed a high-accuracy noninvasive CGM based on OCT angiography (OCTA)-purified blood scattering signals. The blood optical scattering coefficient (BOC) was initially extracted from the depth attenuation of backscattered light in OCT and then purified by eliminating the scattering signals from the surrounding tissues under the guidance of a 3D OCTA vascular map in human skin. The purified BOC was used to estimate the optical blood glucose concentration (BGC) through a linear calibration. The optical and reference BGC measurements were highly correlated (R = 0.94) without apparent time delay. The mean absolute relative difference was 6.09%. All optical BGC measurements were within the clinically acceptable Zones A + B, with 96.69% falling in Zone A on Parke's error grids. The blood glucose response during OGTT was mapped with a high spatiotemporal resolution of the single vessel and 5 seconds. This noninvasive OCTA-based CGM shows promising accuracy for clinical use. Future research will involve larger sample sizes and diabetic participants to confirm these preliminary findings.
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Affiliation(s)
- Mengqin Gao
- State Key Lab of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
| | - Dayou Guo
- State Key Lab of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
| | - Jiahao Wang
- State Key Lab of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
| | - Yizhou Tan
- Department of Laser Medicine, First Medical Center of PLA General Hospital, Beijing 100853, China
| | - Kaiyuan Liu
- State Key Lab of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
| | - Lei Gao
- Jiaxing Key Laboratory of Photonic Sensing and Intelligent Imaging, Jiaxing 314000, China
- Intelligent Optics and Photonics Research Center, Jiaxing Research Institute, Zhejiang University, Jiaxing 314000, China
| | - Yulei Zhang
- State Key Lab of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
| | - Zhihua Ding
- State Key Lab of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
| | - Ying Gu
- Department of Laser Medicine, First Medical Center of PLA General Hospital, Beijing 100853, China
| | - Peng Li
- State Key Lab of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
- Jiaxing Key Laboratory of Photonic Sensing and Intelligent Imaging, Jiaxing 314000, China
- Intelligent Optics and Photonics Research Center, Jiaxing Research Institute, Zhejiang University, Jiaxing 314000, China
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10
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Yang H, Majumder JA, Huang Z, Saluja D, Laurita K, Rollins AM, Hendon CP. Robust, high-density lesion mapping in the left atrium with near-infrared spectroscopy. JOURNAL OF BIOMEDICAL OPTICS 2024; 29:028001. [PMID: 38419756 PMCID: PMC10901242 DOI: 10.1117/1.jbo.29.2.028001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 02/06/2024] [Accepted: 02/09/2024] [Indexed: 03/02/2024]
Abstract
Significance Radiofrequency ablation (RFA) procedures for atrial fibrillation frequently fail to prevent recurrence, partially due to limitations in assessing extent of ablation. Optical spectroscopy shows promise in assessing RFA lesion formation but has not been validated in conditions resembling those in vivo. Aim Catheter-based near-infrared spectroscopy (NIRS) was applied to porcine hearts to demonstrate that spectrally derived optical indices remain accurate in blood and at oblique incidence angles. Approach Porcine left atria were ablated and mapped using a custom-fabricated NIRS catheter. Each atrium was mapped first in phosphate-buffered saline (PBS) then in porcine blood. Results NIRS measurements showed little angle dependence up to 60 deg. A trained random forest model predicted lesions with a sensitivity of 81.7%, a specificity of 86.1%, and a receiver operating characteristic curve area of 0.921. Predicted lesion maps achieved a mean structural similarity index of 0.749 and a mean normalized inner product of 0.867 when comparing maps obtained in PBS and blood. Conclusions Catheter-based NIRS can precisely detect RFA lesions on left atria submerged in blood. Optical parameters are reliable in blood and without perpendicular contact, confirming their ability to provide useful feedback during in vivo RFA procedures.
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Affiliation(s)
- Haiqiu Yang
- Columbia University, Department of Electrical Engineering, New York, United States
| | - Jonah A. Majumder
- Columbia University, Department of Biomedical Engineering, New York, United States
| | - Ziyi Huang
- Columbia University, Department of Electrical Engineering, New York, United States
| | - Deepak Saluja
- Columbia University Irving Medical Center, Cardiology Division, Department of Medicine, New York, United States
| | - Kenneth Laurita
- MetroHealth Hospital, Cardiology Division, Department of Medicine, Cleveland, Ohio, United States
- Case Western Reserve University, Department of Biomedical Engineering, Cleveland, Ohio, United States
| | - Andrew M. Rollins
- Case Western Reserve University, Department of Biomedical Engineering, Cleveland, Ohio, United States
| | - Christine P. Hendon
- Columbia University, Department of Electrical Engineering, New York, United States
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11
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Jeon H, Lee SH, Shin J, Song K, Ahn N, Park J. Elasto-inertial microfluidic separation of microspheres with submicron resolution at high-throughput. MICROSYSTEMS & NANOENGINEERING 2024; 10:15. [PMID: 38264707 PMCID: PMC10803301 DOI: 10.1038/s41378-023-00633-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 10/23/2023] [Accepted: 11/08/2023] [Indexed: 01/25/2024]
Abstract
Elasto-inertial microfluidic separation offers many advantages including high throughput and separation resolution. Even though the separation efficiency highly depends on precise control of the flow conditions, no concrete guidelines have been reported yet in elasto-inertial microfluidics. Here, we propose a dimensionless analysis for precise estimation of the microsphere behaviors across the interface of Newtonian and viscoelastic fluids. Reynolds number, modified Weissenberg number, and modified elastic number are used to investigate the balance between inertial and elastic lift forces. Based on the findings, we introduce a new dimensionless number defined as the width of the Newtonian fluid stream divided by microsphere diameter. The proposed dimensionless analysis allows us to predict whether the microspheres migrate across the co-flow interface. The theoretical estimation is found to be in good agreement with the experimental results using 2.1- and 3.2-μm-diameter polystyrene microspheres in a co-flow of water and polyethylene oxide solution. Based on the theoretical estimation, we also realize submicron separation of the microspheres with 2.1 and 2.5 μm in diameter at high throughput, high purity (>95%), and high recovery rate (>97%). The applicability of the proposed method was validated by separation of platelets from similar-sized Escherichia coli (E.coli).
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Affiliation(s)
- Hyunwoo Jeon
- Department of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro Buk-gu, Gwangju, 61186 Republic of Korea
| | - Song Ha Lee
- Department of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro Buk-gu, Gwangju, 61186 Republic of Korea
| | - Jongho Shin
- Analytical Engineering Team, Samsung Display Co., Ltd., 181 Samsung-ro, Tangjeong-myeon, Asan-si, Chungcheongnam-do, 31454 Republic of Korea
| | - Kicheol Song
- Analytical Engineering Team, Samsung Display Co., Ltd., 181 Samsung-ro, Tangjeong-myeon, Asan-si, Chungcheongnam-do, 31454 Republic of Korea
| | - Nari Ahn
- Analytical Engineering Team, Samsung Display Co., Ltd., 181 Samsung-ro, Tangjeong-myeon, Asan-si, Chungcheongnam-do, 31454 Republic of Korea
| | - Jinsoo Park
- Department of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro Buk-gu, Gwangju, 61186 Republic of Korea
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12
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John T, Kaestner L, Wagner C, Darras A. Early stage of erythrocyte sedimentation rate test: Fracture of a high-volume-fraction gel. PNAS NEXUS 2024; 3:pgad416. [PMID: 38145245 PMCID: PMC10735292 DOI: 10.1093/pnasnexus/pgad416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 11/27/2023] [Indexed: 12/26/2023]
Abstract
Erythrocyte sedimentation rate (ESR) is a clinical parameter used as a nonspecific marker for inflammation, and recent studies have shown that it is linked to the collapse of the gel formed by red blood cells (RBCs) at physiological hematocrits (i.e. RBC volume fraction). Previous research has suggested that the observation of a slower initial dynamics is related to the formation of fractures in the gel. Moreover, RBC gels present specific properties due to the anisotropic shape and flexibility of the RBCs. Namely, the onset of the collapse is reached earlier and the settling velocity of the gel increases with increasing attraction between the RBCs, while the gel of spherical particles shows the opposite trend. Here, we report experimental observations of the gel structure during the onset of the collapse. We suggest an equation modeling this initial process as fracturing of the gel. We demonstrate that this equation provides a model for the motion of the interface between blood plasma and the RBC gel, along the whole time span. We also observe that the increase in the attraction between the RBCs modifies the density of fractures in the gel, which explains why the gel displays an earlier onset when the aggregation energy between the RBCs increases. Our work uncovers the detailed physical mechanism underlying the ESR and provides insights into the fracture dynamics of an RBC gel. These results can improve the accuracy of clinical measurements.
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Affiliation(s)
- Thomas John
- Experimental Physics, Saarland University, Saarbruecken 66123, Germany
| | - Lars Kaestner
- Experimental Physics, Saarland University, Saarbruecken 66123, Germany
- Theoretical Medicine and Biosciences, Saarland University, Homburg 66421, Germany
| | - Christian Wagner
- Experimental Physics, Saarland University, Saarbruecken 66123, Germany
- Physics and Materials Science Research Unit, University of Luxembourg, Luxembourg L-1511, Luxembourg
| | - Alexis Darras
- Experimental Physics, Saarland University, Saarbruecken 66123, Germany
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13
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Pradhan AK, Madagala K, Naga Sravya K, Prakash C. Design and analysis of a photonic crystal nanocavity based bio-sensor for blood component detection. APPLIED OPTICS 2023; 62:9462-9469. [PMID: 38108770 DOI: 10.1364/ao.503892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 11/07/2023] [Indexed: 12/19/2023]
Abstract
A design of a photonic crystal nanocavity based bio-sensor having a footprint of 12×8µm 2 is proposed to detect different blood components. A finite difference time domain (FDTD) numerical technique has been used to characterize the sensor by evaluating its frequency response. The shift in resonant wavelength of the proposed cavity is utilized to detect blood refractive index fluctuation due to the presence of various components. The obtained numerical findings show that the maximum sensitivity for a shift in resonant wavelength is reported as 760 nm/RIU for various blood components. Moreover, the fabrication of PhC is always prone to the fabrication induced disorders. Hence, the impact of fabrication imperfections on the sensor's performance also has been included in the analysis.
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14
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Fischbach A, Lamberti M, Simons JA, Wrede E, Theißen A, Winnersbach P, Rossaint R, Stollenwerk A, Bleilevens C. Early Blood Clot Detection Using Forward Scattering Light Measurements Is Not Superior to Delta Pressure Measurements. BIOSENSORS 2023; 13:1012. [PMID: 38131772 PMCID: PMC10741584 DOI: 10.3390/bios13121012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 11/30/2023] [Accepted: 12/02/2023] [Indexed: 12/23/2023]
Abstract
The occurrence of thrombus formation within an extracorporeal membrane oxygenator is a common complication during extracorporeal membrane oxygenation therapy and can rapidly result in a life-threatening situation due to arterial thromboembolism, causing stroke, pulmonary embolism, and limb ischemia in the patient. The standard clinical practice is to monitor the pressure at the inlet and outlet of oxygenators, indicating fulminant, obstructive clot formation indicated by an increasing pressure difference (ΔP). However, smaller blood clots at early stages are not detectable. Therefore, there is an unmet need for sensors that can detect blood clots at an early stage to minimize the associated thromboembolic risks for patients. This study aimed to evaluate if forward scattered light (FSL) measurements can be used for early blood clot detection and if it is superior to the current clinical gold standard (pressure measurements). A miniaturized in vitro test circuit, including a custom-made test chamber, was used. Heparinized human whole blood was circulated through the test circuit until clot formation occurred. Four LEDs and four photodiodes were placed along the sidewall of the test chamber in different positions for FSL measurements. The pressure monitor was connected to the inlet and the outlet to detect changes in ΔP across the test chamber. Despite several modifications in the LED positions on the test chamber, the FSL measurements could not reliably detect a blood clot within the in vitro test circuit, although the pressure measurements used as the current clinical gold standard detected fulminant clot formation in 11 independent experiments.
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Affiliation(s)
- Anna Fischbach
- Department of Anesthesiology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (J.A.S.); (A.T.); (P.W.); (R.R.)
| | - Michael Lamberti
- Informatics 11—Embedded Software, RWTH Aachen University, 52074 Aachen, Germany; (M.L.); (E.W.); (A.S.)
| | - Julia Alexandra Simons
- Department of Anesthesiology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (J.A.S.); (A.T.); (P.W.); (R.R.)
| | - Erik Wrede
- Informatics 11—Embedded Software, RWTH Aachen University, 52074 Aachen, Germany; (M.L.); (E.W.); (A.S.)
| | - Alexander Theißen
- Department of Anesthesiology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (J.A.S.); (A.T.); (P.W.); (R.R.)
| | - Patrick Winnersbach
- Department of Anesthesiology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (J.A.S.); (A.T.); (P.W.); (R.R.)
| | - Rolf Rossaint
- Department of Anesthesiology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (J.A.S.); (A.T.); (P.W.); (R.R.)
| | - André Stollenwerk
- Informatics 11—Embedded Software, RWTH Aachen University, 52074 Aachen, Germany; (M.L.); (E.W.); (A.S.)
| | - Christian Bleilevens
- Department of Anesthesiology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (J.A.S.); (A.T.); (P.W.); (R.R.)
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15
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Kim D, Kim H. Numerical study on optimization of quantitative treatment conditions for skin cancer photothermal therapy considering multiple blood vessels. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2023; 240:107738. [PMID: 37531686 DOI: 10.1016/j.cmpb.2023.107738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 07/24/2023] [Accepted: 07/27/2023] [Indexed: 08/04/2023]
Abstract
BACKGROUND In recent years, lasers have gained considerable attention as a potential treatment option in the medical field. Photothermal therapy, in particular, has been investigated as a technique to remove tumor tissue by leveraging photothermal effects. The method involves raising the temperature of the tumor tissue to destroy it and has primarily been studied for skin cancer treatment. OBJECTIVE This study aimed to simulate a skin layer with squamous cell carcinoma by using numerical modeling and investigate the effect of different numbers of blood vessels on the temperature distribution in the medium under conditions such as varied laser intensity and gold nanoparticle volume fraction. METHODS Optical properties of the light absorption enhancer were calculated using the discrete dipole approximation method, and the temperature and velocity distribution were computed using continuity, momentum, and energy equations. RESULTS Quantitative determination of the apoptotic variable was performed to evaluate the treatment effect for each case, and the treatment condition with the maximum treatment effect was identified. Laser intensity with optimal therapeutic effect was confirmed to be 0.13 W, 0.15 W, 0.18 W, and 0.24 W, depending on the number of vessels, respectively, and the volume fraction of injected GNRs was confirmed to be 10-6 for all vessel numbers. CONCLUSION The results of this study can serve as a guide for selecting appropriate treatment conditions when conducting photothermal therapy in the future.
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Affiliation(s)
- Donghyuk Kim
- Department of Mechanical Engineering, Ajou University, Suwon-si, Gyeonggi-do 16499, Republic of Korea
| | - Hyunjung Kim
- Department of Mechanical Engineering, Ajou University, Suwon-si, Gyeonggi-do 16499, Republic of Korea.
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16
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Chaudhry N, Albinsson J, Cinthio M, Kröll S, Malmsjö M, Rydén L, Sheikh R, Reistad N, Zackrisson S. Breast Cancer Diagnosis Using Extended-Wavelength-Diffuse Reflectance Spectroscopy (EW-DRS)-Proof of Concept in Ex Vivo Breast Specimens Using Machine Learning. Diagnostics (Basel) 2023; 13:3076. [PMID: 37835819 PMCID: PMC10572577 DOI: 10.3390/diagnostics13193076] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 09/24/2023] [Accepted: 09/26/2023] [Indexed: 10/15/2023] Open
Abstract
This study aims to investigate the feasibility of using diffuse reflectance spectroscopy (DRS) to distinguish malignant breast tissue from adjacent healthy tissue, and to evaluate if an extended-wavelength range (450-1550 nm) has an advantage over the standard wavelength range (450-900 nm). Multivariate statistics and machine learning algorithms, either linear discriminant analysis (LDA) or support vector machine (SVM) are used to distinguish the two tissue types in breast specimens (total or partial mastectomy) from 23 female patients with primary breast cancer. EW-DRS has a sensitivity of 94% and specificity of 91% as compared to a sensitivity of 40% and specificity of 71% using the standard wavelength range. The results suggest that DRS can discriminate between malignant and healthy breast tissue, with improved outcomes using an extended wavelength. It is also possible to construct a simple analytical model to improve the diagnostic performance of the DRS technique.
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Affiliation(s)
- Nadia Chaudhry
- Department of Translational Medicine, Diagnostic Radiology, Lund University, 205 02 Malmö, Sweden;
- Department of Medical Imaging and Physiology, Skåne University Hospital, 214 28 Malmö, Sweden
| | - John Albinsson
- Department of Clinical Sciences Lund, Ophthalmology, Skåne University Hospital, Lund University, 223 62 Lund, Sweden; (J.A.); (M.M.)
| | - Magnus Cinthio
- Department of Biomedical Engineering, Lund University, 221 00 Lund, Sweden;
| | - Stefan Kröll
- Department of Physics, Lund University, 221 00 Lund, Sweden; (S.K.); (N.R.)
| | - Malin Malmsjö
- Department of Clinical Sciences Lund, Ophthalmology, Skåne University Hospital, Lund University, 223 62 Lund, Sweden; (J.A.); (M.M.)
| | - Lisa Rydén
- Department of Surgery, Skåne University Hospital, 205 02 Malmö, Sweden
- Department of Clinical Sciences Lund, Surgery, Lund University, 221 85 Lund, Sweden
| | - Rafi Sheikh
- Department of Clinical Sciences Lund, Ophthalmology, Skåne University Hospital, Lund University, 223 62 Lund, Sweden; (J.A.); (M.M.)
| | - Nina Reistad
- Department of Physics, Lund University, 221 00 Lund, Sweden; (S.K.); (N.R.)
| | - Sophia Zackrisson
- Department of Translational Medicine, Diagnostic Radiology, Lund University, 205 02 Malmö, Sweden;
- Department of Medical Imaging and Physiology, Skåne University Hospital, 214 28 Malmö, Sweden
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17
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Morita N, Iwasaki W. Design and Fabrication of a Thin and Micro-Optical Sensor for Rapid Prototyping. SENSORS (BASEL, SWITZERLAND) 2023; 23:7658. [PMID: 37688114 PMCID: PMC10563074 DOI: 10.3390/s23177658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/22/2023] [Accepted: 09/01/2023] [Indexed: 09/10/2023]
Abstract
Optical sensing offers several advantages owing to its non-invasiveness and high sensitivity. The miniaturization of optical sensors will mitigate spatial and weight constraints, expanding their applications and extending the principal advantages of optical sensing to different fields, such as healthcare, Internet of Things, artificial intelligence, and other aspects of society. In this study, we present the development of a miniature optical sensor for monitoring thrombi in extracorporeal membrane oxygenation (ECMO). The sensor, based on a complementary metal-oxide semiconductor integrated circuit (CMOS-IC), also serves as a photodiode, amplifier, and light-emitting diode (LED)-mounting substrate. It is sized 3.8 × 4.8 × 0.75 mm3 and provides reflectance spectroscopy at three wavelengths. Based on semiconductor and microelectromechanical system (MEMS) processes, the design of the sensor achieves ultra-compact millimeter size, customizability, prototyping, and scalability for mass production, facilitating the development of miniature optical sensors for a variety of applications.
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Affiliation(s)
- Nobutomo Morita
- Sensing System Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tosu 841-0052, Japan
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18
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Yu CY, Chammas M, Gurden H, Lin HH, Pain F. Design and validation of a convolutional neural network for fast, model-free blood flow imaging with multiple exposure speckle imaging. BIOMEDICAL OPTICS EXPRESS 2023; 14:4439-4454. [PMID: 37791260 PMCID: PMC10545206 DOI: 10.1364/boe.492739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 06/15/2023] [Accepted: 07/10/2023] [Indexed: 10/05/2023]
Abstract
Multiple exposure speckle imaging has demonstrated its improved accuracy compared to single exposure speckle imaging for relative quantitation of blood flow in vivo. However, the calculation of blood flow maps relies on a pixelwise non-linear fit of a multi-parametric model to the speckle contrasts. This approach has two major drawbacks. First, it is computer-intensive and prevents real time imaging and, second, the mathematical model is not universal and should in principle be adapted to the type of blood vessels. We evaluated a model-free machine learning approach based on a convolutional neural network as an alternative to the non-linear fit approach. A network was designed and trained with annotated speckle contrast data from microfluidic experiments. The neural network performances are then compared to the non-linear fit approach applied to in vitro and in vivo data. The study demonstrates the potential of convolutional networks to provide relative blood flow maps from multiple exposure speckle data in real time.
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Affiliation(s)
- Chao-Yueh Yu
- Chang-Gung University, Department of Medical Imaging and Radiological Sciences, Taoyuan City, Taiwan
| | - Marc Chammas
- Université Paris-Saclay, Institut d'Optique Graduate School, CNRS, Laboratoire Charles Fabry, 91127, Palaiseau, France
| | - Hirac Gurden
- Université Paris Cité, CNRS, Laboratoire Biologie Fonctionnelle et Adaptative, 75013, Paris, France
| | - Hsin-Hon Lin
- Chang-Gung University, Department of Medical Imaging and Radiological Sciences, Taoyuan City, Taiwan
- Department of Nuclear Medicine, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Frédéric Pain
- Université Paris-Saclay, Institut d'Optique Graduate School, CNRS, Laboratoire Charles Fabry, 91127, Palaiseau, France
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19
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Busch L, Kröger M, Schleusener J, Klein AL, Lohan SB, Guttmann M, Keck CM, Meinke MC. Evaluation of DNA lesions and radicals generated by a 233 nm far-UVC LED in superficial ex vivo skin wounds. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2023; 245:112757. [PMID: 37481791 DOI: 10.1016/j.jphotobiol.2023.112757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 06/02/2023] [Accepted: 07/17/2023] [Indexed: 07/25/2023]
Abstract
The application of a far-ultraviolet C (UVC) light emitting diode (LED) of 233 nm showed significant bactericidal efficacy at an applied dose between 20 and 80 mJ cm-2 as reported recently. In addition, only minor epidermal DNA lesions were observed in ex vivo human skin and in vitro epidermal models <10% of the minimal erythema dose of UVB radiation. To broaden the potential range of applications of such systems, e.g. to include postoperative application on wounds for the purpose of decontamination, we assessed how a disruption of normal anatomic skin structure and function influences the skin damage induced by light from 233 nm far-UVC LEDs. Thus, we induced superficial skin wounds by mechanical detachment of the stratum corneum in ex vivo human skin. Barrier-disruption of the skin could be successfully determined by measuring an increase in the transepidermal water loss (TEWL) and the stratum corneum loss could be determined morphologically by 2-photon microscopy (2-PM). After far-UVC irradiation of the skin, we screened the tissue for the development of cyclobutane pyrimidine dimers (CPDs) and 6-4 photoproducts (6-4PPs). The abundance of DNA lesions was elevated in wound skin in comparison to intact skin after irradiation with far-UVC. However, no increase in DNA lesions was detected when artificial wound exudate consisting of cell culture medium and serum was applied to the disrupted skin surface prior to irradiation. This effect agrees with the results of ray tracing simulations of the absorption of far-UVC light incident on a superficial skin wound. Interestingly, no significant deviations in radical formation between intact skin and superficially wounded skin were detected after far-UVC irradiation as analyzed by electron paramagnetic resonance (EPR) spectroscopy. In conclusion, 233 nm LED light at a dose of 60 mJ/cm2 could be applied safely on superficial wounds for the purpose of skin antisepsis as long as the wounds are covered with wound fluid.
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Affiliation(s)
- Loris Busch
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Dermatology, Venereology and Allergology, Center of Experimental and Applied Cutaneous Physiology, Charitéplatz 1, 10117 Berlin, Germany; Philipps-Universität Marburg, Department of Pharmaceutics and Biopharmaceutics, Robert-Koch-Str. 4, 35032 Marburg, Germany.
| | - Marius Kröger
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Dermatology, Venereology and Allergology, Center of Experimental and Applied Cutaneous Physiology, Charitéplatz 1, 10117 Berlin, Germany
| | - Johannes Schleusener
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Dermatology, Venereology and Allergology, Center of Experimental and Applied Cutaneous Physiology, Charitéplatz 1, 10117 Berlin, Germany
| | - Anna Lena Klein
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Dermatology, Venereology and Allergology, Center of Experimental and Applied Cutaneous Physiology, Charitéplatz 1, 10117 Berlin, Germany
| | - Silke B Lohan
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Dermatology, Venereology and Allergology, Center of Experimental and Applied Cutaneous Physiology, Charitéplatz 1, 10117 Berlin, Germany
| | - Martin Guttmann
- Ferdinand-Braun-Institut (FBH), Gustav-Kirchhoff-Straße 4, 12489 Berlin, Germany
| | - Cornelia M Keck
- Philipps-Universität Marburg, Department of Pharmaceutics and Biopharmaceutics, Robert-Koch-Str. 4, 35032 Marburg, Germany
| | - Martina C Meinke
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Dermatology, Venereology and Allergology, Center of Experimental and Applied Cutaneous Physiology, Charitéplatz 1, 10117 Berlin, Germany
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20
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Somers T, Allard NAE, Siddiqi S, Janssen MCM, Hopman MTE, Morshuis WJ, Russel FGM, Timmers S, Schirris TJJ. Mitochondrial complex III activity: from invasive muscle biopsies to patient-friendly buccal swab analysis. Sci Rep 2023; 13:9638. [PMID: 37316639 DOI: 10.1038/s41598-023-36741-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 06/08/2023] [Indexed: 06/16/2023] Open
Abstract
Drug-induced mitochondrial dysfunction is a common adverse effect, particularly in case of statins-the most prescribed drugs worldwide. These drugs have been shown to inhibit complex III (CIII) of the mitochondrial oxidative phosphorylation process, which is related to muscle pain. As muscle pain is the most common complaint of statin users, it is crucial to distinguish it from other causes of myalgia to prevent unnecessary cessation of drug therapy. However, diagnosing CIII inhibition currently requires muscle biopsies, which are invasive and not practical for routine testing. Less invasive alternatives for measurement of mitochondrial complex activities are only available yet for complex I and IV. Here, we describe a non-invasive spectrophotometric method to determine CIII catalytic activities using buccal swabs, which we validated in a cohort of statin and non-statin users. Our data indicate that CIII can be reliably measured in buccal swabs, as evidenced by reproducible results above the detection limit. Further validation on a large-scale clinical setting is recommended.
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Affiliation(s)
- Tim Somers
- Department of Cardiothoracic Surgery, Radboud University Medical Center, Geert Grooteplein Zuid 10, P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands.
- Department of Pharmacology and Toxicology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands.
- Radboud Center for Mitochondrial Medicine, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands.
| | - Neeltje A E Allard
- Department of Physiology, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Sailay Siddiqi
- Department of Cardiothoracic Surgery, Radboud University Medical Center, Geert Grooteplein Zuid 10, P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands
- Radboud Center for Mitochondrial Medicine, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
| | - Margit C M Janssen
- Department of Pharmacology and Toxicology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
| | - Maria T E Hopman
- Department of Physiology, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Wim J Morshuis
- Department of Cardiothoracic Surgery, Radboud University Medical Center, Geert Grooteplein Zuid 10, P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Frans G M Russel
- Department of Pharmacology and Toxicology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
- Radboud Center for Mitochondrial Medicine, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
| | - Silvie Timmers
- Department of Human and Animal Physiology, Wageningen University, Wageningen, The Netherlands
| | - Tom J J Schirris
- Department of Pharmacology and Toxicology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
- Radboud Center for Mitochondrial Medicine, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
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21
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Banerjee S, Sarkar S, Saha S, Hira SK, Karmakar S. Observing temporal variation in hemolysis through photoacoustics with a low cost LASER diode based system. Sci Rep 2023; 13:7002. [PMID: 37117171 PMCID: PMC10147907 DOI: 10.1038/s41598-023-32839-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 04/03/2023] [Indexed: 04/30/2023] Open
Abstract
Patients under hemolytic condition need continuous monitoring of lysis as depletion of Red Blood Cells (RBC) and the presence of antioxidant free hemoglobin (Hb) in excess amount due to hemolysis lead to severe deterioration of their health. Out of many modalities, Photoacoustics (PA) offers real time information noninvasively from deep lying blood vessels since Hb is the strongest chromophore in mammalian blood and the PA response of blood varies with the amount of Hb present. During hemolysis, total Hb content in blood however remains unchanged, thus, questions the use of PA in hemolysis detection. In this report, a hypothesis that the amplitude of the PA signal would not change with the amount of lysis is framed and tested by applying osmotic shock to the RBCs in hypotonic environment and the PA response is recorded over time using a low cost NIR based PA system. The experimental outcome indicates that PA amplitude falls off as lysis progresses in course of time consequently rejecting the hypothesis. The decaying PA response also carries the signature of RBC swelling during the early phase of lysis. The PA measurement can detect hemolysis as low as 1.7%. These findings further advocate transforming this NIR-PA system into a portable, noninvasive patient care device to monitor hemolysis in-vivo.
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Affiliation(s)
- Soumyodeep Banerjee
- University Science Instrumentation Centre, The University of Burdwan, Bardhaman, 713104, India
| | - Sandip Sarkar
- Applied Nuclear Physics Division, Saha Institute of Nuclear Physics, A CI of Homi Bhabha National Institute, Kolkata, 700064, India
| | - Shaibal Saha
- Applied Nuclear Physics Division, Saha Institute of Nuclear Physics, A CI of Homi Bhabha National Institute, Kolkata, 700064, India
| | - Sumit K Hira
- Department of Zoology, The University of Burdwan, Bardhaman, 713104, India
| | - Subhajit Karmakar
- University Science Instrumentation Centre, The University of Burdwan, Bardhaman, 713104, India.
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22
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Toda S, Matsumura K. Investigation of Optimal Light Source Wavelength for Cuffless Blood Pressure Estimation Using a Single Photoplethysmography Sensor. SENSORS (BASEL, SWITZERLAND) 2023; 23:3689. [PMID: 37050747 PMCID: PMC10098792 DOI: 10.3390/s23073689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 03/30/2023] [Accepted: 03/30/2023] [Indexed: 06/19/2023]
Abstract
Routine blood pressure measurement is important for the early detection of various diseases. Recently, cuffless blood pressure estimation methods that do not require cuff pressurization have attracted attention. In this study, we investigated the effect of the light source wavelength on the accuracy of blood pressure estimation using only two physiological indices that can be calculated with photoplethysmography alone, namely, heart rate and modified normalized pulse volume. Using a newly developed photoplethysmography sensor that can simultaneously measure photoplethysmograms at four wavelengths, we evaluated its estimation accuracy for systolic blood pressure, diastolic blood pressure, and mean arterial pressure against a standard cuff sphygmomanometer. Mental stress tasks were used to alter the blood pressure of 14 participants, and multiple linear regression analysis showed the best light sources to be near-infrared for systolic blood pressure and blue for both diastolic blood pressure and mean arterial pressure. The importance of the light source wavelength for the photoplethysmogram in cuffless blood pressure estimation was clarified.
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Affiliation(s)
- Sogo Toda
- Ishikawa College, National Institute of Technology, Tsubata 929-0392, Japan
| | - Kenta Matsumura
- Faculty of Medicine, University of Toyama, Toyama 930-0194, Japan
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23
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Sullender CT, Santorelli A, Richards LM, Mannava PK, Smith C, Dunn AK. Using pressure-driven flow systems to evaluate laser speckle contrast imaging. JOURNAL OF BIOMEDICAL OPTICS 2023; 28:036003. [PMID: 36915371 PMCID: PMC10007838 DOI: 10.1117/1.jbo.28.3.036003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 02/02/2023] [Indexed: 06/18/2023]
Abstract
SIGNIFICANCE Microfluidic flow phantom studies are commonly used for characterizing the performance of laser speckle contrast imaging (LSCI) instruments. The selection of the flow control system is critical for the reliable generation of flow during testing. The majority of recent LSCI studies using microfluidics used syringe pumps for flow control. AIM We quantified the uncertainty in flow generation for a syringe pump and a pressure-regulated flow system. We then assessed the performance of both LSCI and multi-exposure speckle imaging (MESI) using the pressure-regulated flow system across a range of flow speeds. APPROACH The syringe pump and pressure-regulated flow systems were evaluated during stepped flow profile experiments in a microfluidic device using an inline flow sensor. The uncertainty associated with each flow system was calculated and used to determine the reliability for instrument testing. The pressure-regulated flow system was then used to characterize the relative performance of LSCI and MESI during stepped flow profile experiments while using the inline flow sensor as reference. RESULTS The pressure-regulated flow system produced much more stable and reproducible flow outputs compared to the syringe pump. The expanded uncertainty for the syringe pump was 8 to 20 × higher than that of the pressure-regulated flow system across the tested flow speeds. Using the pressure-regulated flow system, MESI outperformed single-exposure LSCI at all flow speeds and closely mirrored the flow sensor measurements, with average errors of 4.6 % ± 2.6 % and 15.7 % ± 4.6 % , respectively. CONCLUSIONS Pressure-regulated flow systems should be used instead of syringe pumps when assessing the performance of flow measurement techniques with microfluidic studies. MESI offers more accurate relative flow measurements than traditional LSCI across a wide range of flow speeds.
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Affiliation(s)
- Colin T. Sullender
- The University of Texas at Austin, Department of Biomedical Engineering, Austin, Texas, United States
| | - Adam Santorelli
- The University of Texas at Austin, Department of Biomedical Engineering, Austin, Texas, United States
| | - Lisa M. Richards
- The University of Texas at Austin, Department of Biomedical Engineering, Austin, Texas, United States
| | - Pawan K. Mannava
- The University of Texas at Austin, Department of Biomedical Engineering, Austin, Texas, United States
| | - Christopher Smith
- The University of Texas at Austin, Department of Biomedical Engineering, Austin, Texas, United States
| | - Andrew K. Dunn
- The University of Texas at Austin, Department of Biomedical Engineering, Austin, Texas, United States
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24
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Malek C, Al-Dossari M, Awasthi SK, Ismail MA, El-Gawaad NSA, Sabra W, Aly AH. High performance biosensor composed of 1D defective photonic crystal for sensing and detection of distinguished blood components. OPTICAL AND QUANTUM ELECTRONICS 2023; 55:196. [DOI: 10.1007/s11082-022-04460-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 12/03/2022] [Indexed: 09/02/2023]
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25
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de Vries E, Alic L, Schols RM, Emanuel KS, Wieringa FP, Bouvy ND, Tuijthof GJM. Near-Infrared Spectral Similarity between Ex Vivo Porcine and In Vivo Human Tissue. Life (Basel) 2023; 13:life13020357. [PMID: 36836713 PMCID: PMC9959888 DOI: 10.3390/life13020357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 01/11/2023] [Accepted: 01/17/2023] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND In vivo diffuse reflectance spectroscopy provides additional contrast in discriminating nerves embedded in adipose tissue during surgery. However, large datasets are required to achieve clinically acceptable classification levels. This study assesses the spectral similarity between ex vivo porcine and in vivo human spectral data of nerve and adipose tissue, as porcine tissue could contribute to generate large datasets. METHODS Porcine diffuse reflectance spectra were measured at 124 nerve and 151 adipose locations. A previously recorded dataset of 32 in vivo human nerve and 23 adipose tissue locations was used for comparison. In total, 36 features were extracted from the raw porcine to generate binary logistic regression models for all combinations of two, three, four and five features. Feature selection was performed by assessing similar means between normalized features of nerve and of adipose tissue (Kruskal-Wallis test, p < 0.05) and for models performing best on the porcine cross validation set. The human test set was used to assess classification performance. RESULTS The binary logistic regression models with selected features showed an accuracy of 60% on the test set. CONCLUSIONS Spectral similarity between ex vivo porcine and in vivo human adipose and nerve tissue was present, but further research is required.
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Affiliation(s)
- Eva de Vries
- Research Engineering, Faculty of Health, Medicine, Life Sciences, Maastricht University, 6229 ER Maastricht, The Netherlands
| | - Lejla Alic
- Magnetic Detection and Imaging Group, Technical Medical Centre, Faculty of Science and Technology, University of Twente, 7522 NB Enschede, The Netherlands
| | - Rutger M. Schols
- Department of Plastic, Reconstructive and Hand Surgery, Maastricht University Medical Centre+, 6229 HX Maastricht, The Netherlands
| | - Kaj S. Emanuel
- Department of Orthopaedic Surgery, Faculty of Health, Medicine, Life Sciences, Maastricht University, 6229 ER Maastricht, The Netherlands
- Department of Orthopedic Surgery and Sports Medicine, Amsterdam UMC, University of Amsterdam, Amsterdam Movement Sciences, 1105 AZ Amsterdam, The Netherlands
| | | | - Nicole D. Bouvy
- Department of Surgery, School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Centre+, 6229 HX Maastricht, The Netherlands
| | - Gabriëlle J. M. Tuijthof
- Research Engineering, Faculty of Health, Medicine, Life Sciences, Maastricht University, 6229 ER Maastricht, The Netherlands
- Department of Biomechanical Engineering, Faculty of Engineering Technologies, University of Twente, 7522 NB Enschede, The Netherlands
- Correspondence: ; Tel.: +31-639265645
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26
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Meng S, Su H, Guo J, Wang L, Li T. Noninvasive optical monitoring of pulmonary embolism: a Monte Carlo study on visible Chinese human thoracic tissues. JOURNAL OF BIOMEDICAL OPTICS 2023; 28:015001. [PMID: 36688229 PMCID: PMC9847892 DOI: 10.1117/1.jbo.28.1.015001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 12/13/2022] [Indexed: 06/17/2023]
Abstract
Significance In recent years, the incidence rate of pulmonary embolism (PE) has increased dramatically. Currently, the correct diagnosis rate of PE in China is relatively low, and the diagnosis error rate and missed diagnosis rate were as high as about 80%. The most standard method of PE detection is pulmonary artery digital subtraction angiography (DSA), but pulmonary artery DSA is an invasive examination, and patients can have certain risks and discomfort. Noninvasive monitoring of PE remains challenging in cardiovascular medicine. Aim We attempt to study the light propagation in human thoracic tissues and explore the possibility of near-infrared spectroscopy (NIRS) in noninvasive detection of PE. Approach In this study, by utilizing the Monte Carlo simulation method for voxelized media and the Visible Chinese Human dataset, we quantified and visualized the photon migration in human thoracic region. The influence of the development (three levels) of PE on the light migration was observed. Results Results showed that around 4.6% light fluence was absorbed by the pulmonary tissue. The maximum signal sensitivity distribution reached 0.073% at the 2.8- to 3.1-cm light source-detector separation. The normalized light intensity was significantly different among different PE levels and formed a linear relationship (r 2 = 0.998 , p < 10 - 5 ). Conclusions The study found that photons could reach the pulmonary artery tissue, the light intensity was linearly related to the degrees of embolism, PE could be quantitatively diagnosed by NIRS. Meanwhile, the optimized distance in between the light source and detector, 2.8 to 3.1 cm, was recommended to be used in future potential noninvasive optical diagnosis of PE.
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Affiliation(s)
- Shuo Meng
- Chinese Academy of Medical Sciences, Institute of Biomedical Engineering, Peking Union Medical College, Tianjin, China
- Tiangong University, Tianjin, China
| | - Hengjie Su
- Chinese Academy of Medical Sciences, Institute of Biomedical Engineering, Peking Union Medical College, Tianjin, China
| | - Jianghui Guo
- Chinese Academy of Medical Sciences, Institute of Biomedical Engineering, Peking Union Medical College, Tianjin, China
- University of Electronic Science and Technology of China, Chengdu, China
| | - Lingxiao Wang
- Chinese Academy of Medical Sciences, Institute of Biomedical Engineering, Peking Union Medical College, Tianjin, China
| | - Ting Li
- Chinese Academy of Medical Sciences, Institute of Biomedical Engineering, Peking Union Medical College, Tianjin, China
- Chinese Institute for Brain Research, Beijing, China
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27
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Guo J, Meng S, Su H, Zhang B, Li T. Non-invasive optical monitoring of human lungs: Monte Carlo modeling of photon migration in Visible Chinese Human and an experimental test on a human. BIOMEDICAL OPTICS EXPRESS 2022; 13:6389-6403. [PMID: 36589576 PMCID: PMC9774858 DOI: 10.1364/boe.472530] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 09/30/2022] [Accepted: 10/23/2022] [Indexed: 05/02/2023]
Abstract
The human lung was quantified and visualized by photon transport in this paper. A Monte Carlo (MC) simulation of voxelized media was used with the visible Chinese human (VCH). This study theoretically explored the feasibility of non-invasive optical detection of pulmonary hemodynamics, and investigated the optimal location of the light source in the lung photon migration and optimized the source-detector distance. The light fluence intensity showed that the photon penetration depth was 6-8.4 mm in the human lung. The optimal distance from the light source to the detector was 2.7-2.9 cm, but the optimal distance of the superior lobe of right lung was 3.3-3.5 cm. We then conducted experiments on diffuse light reflectance using NIRS on 14 volunteers. These measurements agree well with the simulation results. All the results demonstrated the great potential of non-invasive monitoring of pulmonary hemodynamics and contribute to the study of human lungs in the biomedical optics community.
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Affiliation(s)
- Jianghui Guo
- Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, China
- School of optoelectronic science and engineering, University of Electronic Science & Technology of China, Chengdu, 611731, China
| | - Shuo Meng
- Tiangong University, Tianjin, 300387, China
| | - Hengjie Su
- Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, China
| | - Bowen Zhang
- Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, China
| | - Ting Li
- Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, China
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28
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Zou Y, Amidi E, Luo H, Zhu Q. Ultrasound-enhanced Unet model for quantitative photoacoustic tomography of ovarian lesions. PHOTOACOUSTICS 2022; 28:100420. [PMID: 36325304 PMCID: PMC9619170 DOI: 10.1016/j.pacs.2022.100420] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 10/04/2022] [Accepted: 10/24/2022] [Indexed: 05/17/2023]
Abstract
Quantitative photoacoustic tomography (QPAT) is a valuable tool in characterizing ovarian lesions for accurate diagnosis. However, accurately reconstructing a lesion's optical absorption distributions from photoacoustic signals measured with multiple wavelengths is challenging because it involves an ill-posed inverse problem with three unknowns: the Grüneisen parameter ( Γ ) , the absorption distribution, and the optical fluence ( ϕ ) . Here, we propose a novel ultrasound-enhanced Unet model (US-Unet) that reconstructs optical absorption distribution from PAT data. A pre-trained ResNet-18 extracts the US features typically identified as morphologies of suspicious ovarian lesions, and a Unet is implemented to reconstruct optical absorption coefficient maps, using the initial pressure and US features extracted by ResNet-18. To test this US-Unet model, we calculated the blood oxygenation saturation values and total hemoglobin concentrations from 655 regions of interest (ROIs) (421 benign, 200 malignant, and 34 borderline ROIs) obtained from clinical images of 35 patients with ovarian/adnexal lesions. A logistic regression model was used to compute the ROC, the area under the ROC curve (AUC) was 0.94, and the accuracy was 0.89. To the best of our knowledge, this is the first study to reconstruct quantitative PAT with PA signals and US-based structural features.
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Affiliation(s)
- Yun Zou
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, USA
| | - Eghbal Amidi
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, USA
| | - Hongbo Luo
- Department of Electrical and System Engineering, Washington University in St. Louis, St. Louis, MO, USA
| | - Quing Zhu
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, USA
- Department of Radiology, Washington University in St. Louis School of Medicine, St. Louis, MO, USA
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29
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Lyu S, He Y, Tao X, Yao Y, Huang X, Ma Y, Peng Z, Ding Y, Wang Y. Subcutaneous power supply by NIR-II light. Nat Commun 2022; 13:6596. [PMID: 36329024 PMCID: PMC9633840 DOI: 10.1038/s41467-022-34047-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Accepted: 10/12/2022] [Indexed: 11/06/2022] Open
Abstract
Implantable medical devices are wished to be recharged via contactless power transfer technologies without interventional operations. Superior to subcutaneous power supply by visible light or electromagnetic wave, second near-infrared (NIR-II) light is predicted to possess 60 times subcutaneous power transmission but hard to be utilized. Here we report a photo-thermal-electric converter via the combination of photothermal conversion and thermoelectric conversion. It is able to generate an output power as high as 195 mW under the coverage of excised tissues, presenting advantages of non-invasion, high output power, negligible biological damage, and deep tissue penetration. As an in vivo demonstration, the output power of a packaged converter in the abdominal cavity of a rabbit reaches 20 mW under NIR-II light irradiation through the rabbit skin with a thickness of 8.5 mm. This value is high enough to recharge an implanted high-power-consumption wireless camera and transfer video signal out of body in real-time.
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Affiliation(s)
- Shanzhi Lyu
- grid.24539.390000 0004 0368 8103Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, 100872 Beijing, China ,grid.12527.330000 0001 0662 3178Department of Energy and Power Engineering, Tsinghua University, 100082 Beijing, China
| | - Yonglin He
- grid.24539.390000 0004 0368 8103Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, 100872 Beijing, China
| | - Xinglei Tao
- grid.24539.390000 0004 0368 8103Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, 100872 Beijing, China
| | - Yuge Yao
- grid.12527.330000 0001 0662 3178Department of Energy and Power Engineering, Tsinghua University, 100082 Beijing, China
| | - Xiangyi Huang
- grid.24539.390000 0004 0368 8103Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, 100872 Beijing, China
| | - Yingchao Ma
- grid.24539.390000 0004 0368 8103Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, 100872 Beijing, China
| | - Zhimin Peng
- grid.12527.330000 0001 0662 3178Department of Energy and Power Engineering, Tsinghua University, 100082 Beijing, China
| | - Yanjun Ding
- grid.12527.330000 0001 0662 3178Department of Energy and Power Engineering, Tsinghua University, 100082 Beijing, China
| | - Yapei Wang
- grid.24539.390000 0004 0368 8103Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, 100872 Beijing, China
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30
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Reistad N, Sturesson C. Distinguishing tumor from healthy tissue in human liver ex vivo using machine learning and multivariate analysis of diffuse reflectance spectra. JOURNAL OF BIOPHOTONICS 2022; 15:e202200140. [PMID: 35860880 DOI: 10.1002/jbio.202200140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 06/27/2022] [Accepted: 07/12/2022] [Indexed: 06/15/2023]
Abstract
The aim of this work was to evaluate the capability of diffuse reflectance spectroscopy to distinguish malignant liver tissues from surrounding tissues and to determine whether an extended wavelength range (450-1550 nm) offers any advantages over using the conventional wavelength range. Furthermore, multivariate analysis combined with a machine learning algorithm, either linear discriminant analysis or the more advanced support vector machine, was used to discriminate between and classify freshly excised human liver specimens from 18 patients. Tumors were distinguished from surrounding liver tissues with a sensitivity of 99%, specificity of 100%, classification rate of 100% and a Matthews correlation coefficient of 100% using the extended wavelength range and a combination of principal component analysis and support vector techniques. The results indicate that this technology may be useful in clinical applications for real-time tissue diagnostics of tumor margins where rapid classification is important.
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Affiliation(s)
- Nina Reistad
- Department of Physics, Lund University, Lund, Sweden
| | - Christian Sturesson
- Division of Surgery, Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
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31
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Kolar R, Vicar T, Odstrcilik J, Valterova E, Skorkovska K, Kralik M, Tornow RP. Multispectral retinal video-ophthalmoscope with fiber optic illumination. JOURNAL OF BIOPHOTONICS 2022; 15:e202200094. [PMID: 35604408 DOI: 10.1002/jbio.202200094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 05/17/2022] [Accepted: 05/18/2022] [Indexed: 06/15/2023]
Abstract
Multispectral imaging is used in various applications including astronomy, industry and agriculture. In retinal imaging, the single-shot multispectral image stack is typically acquired and analyzed. This multispectral analysis can provide information on various structural or metabolic properties. This paper describes the multispectral improvement of a video-ophthalmoscope, which can acquire retinal video sequences of the optic nerve head and peripapillary area using various spectral light illumination. The description of the multispectral video imaging is provided and several applications are described. These applications include multispectral retinal photoplethysmography, visualization of spontaneous vein pulsation and multispectral RGB image generation.
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Affiliation(s)
- Radim Kolar
- Department of Biomedical Engineering, Faculty of Electrical Engineering and Communication, Brno University of Technology, Brno, Czech Republic
| | - Tomas Vicar
- Department of Biomedical Engineering, Faculty of Electrical Engineering and Communication, Brno University of Technology, Brno, Czech Republic
| | - Jan Odstrcilik
- Department of Biomedical Engineering, Faculty of Electrical Engineering and Communication, Brno University of Technology, Brno, Czech Republic
| | - Eva Valterova
- Department of Biomedical Engineering, Faculty of Electrical Engineering and Communication, Brno University of Technology, Brno, Czech Republic
| | - Karolina Skorkovska
- Department of Ophthalmology and Optometry, St. Ann University Hospital, Brno, Czech Republic
- Department of Ophthalmology and Optometry, Masaryk University, Brno, Czech Republic
| | - Martin Kralik
- Department of Biomedical Engineering, Faculty of Electrical Engineering and Communication, Brno University of Technology, Brno, Czech Republic
| | - Ralf-Peter Tornow
- Department of Ophthalmology, Friedrich-Alexander-University Erlangen-Nürnberg, Germany
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32
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Huang Z, Zhang J, Gong H, Yang X. Multimodality system of x-ray and fluorescence based on Fourier single-pixel imaging for small animals. JOURNAL OF BIOMEDICAL OPTICS 2022; 27:090501. [PMID: 36114605 PMCID: PMC9478903 DOI: 10.1117/1.jbo.27.9.090501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 08/29/2022] [Indexed: 06/15/2023]
Abstract
SIGNIFICANCE The multimodality imaging system has become a powerful tool for in-vivo biomedical research. However, a conventional multimodality system generally employs two independent detectors, which is costly and bulky. Meanwhile, the geometric cocalibration and image registration between the imaging modalities are also complicated. AIM To acquire the multimodality images for small animals with only one visible light sensed single-pixel detector. APPROACH The system is built based on a structured detection Fourier single-pixel imaging architecture. A cesium iodide doped with thallium [CsI(Tl)] scintillator plate is placed behind the sample in x-ray imaging, so the x-ray images can be converted to be visible and sensed with the same single-pixel detector as applied in fluorescence imaging. RESULTS The spatial resolution of x-ray imaging was measured to be 1.81 mm, the sensitivity and the imaging depth of fluorescence imaging was evaluated to be ∼1.48 nmol / ml and 4 mm, respectively. In vivo multimodality imaging of a C57BL/6 female mouse bearing tumor targeted with mCherry was carried out. CONCLUSIONS We proposed an x-ray and fluorescence multimodality imaging system for small animals via the structured detection FSI architecture. The system is low cost, with a more compact structure, and free of image registration from different modalities. In vivo multimodality imaging results of a mouse bearing tumor demonstrate its capability for small animal research.
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Affiliation(s)
- Zhuoyao Huang
- Huazhong University of Science and Technology, Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, Wuhan, China
| | - Jie Zhang
- Huazhong University of Science and Technology, Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, Wuhan, China
| | - Hui Gong
- Huazhong University of Science and Technology, Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, Wuhan, China
- HUST-Suzhou Institute for Brainsmatics, JITRI, Suzhou, China
| | - Xiaoquan Yang
- Huazhong University of Science and Technology, Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, Wuhan, China
- HUST-Suzhou Institute for Brainsmatics, JITRI, Suzhou, China
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33
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Fang R, Rubinoff I, Zhang HF. Multiple forward scattering reduces the measured scattering coefficient of whole blood in visible-light optical coherence tomography. BIOMEDICAL OPTICS EXPRESS 2022; 13:4510-4527. [PMID: 36187273 PMCID: PMC9484418 DOI: 10.1364/boe.459607] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 07/18/2022] [Accepted: 07/19/2022] [Indexed: 05/10/2023]
Abstract
The optical properties of blood encode oxygen-dependent information. Noninvasive optical detection of these properties is increasingly desirable to extract biomarkers for tissue health. Recently, visible-light optical coherence tomography (vis-OCT) demonstrated retinal oxygen saturation (sO2) measurements by inversely measuring the oxygen-dependent absorption and scattering coefficients of whole blood. However, vis-OCT may be sensitive to optical scattering properties of whole blood, different from those reported in the literature. Incorrect assumptions of such properties can add additional uncertainties or biases to vis-OCT's sO2 model. This work investigates whole blood's scattering coefficient measured by vis-OCT. Using Monte Carlo simulation of a retinal vessel, we determined that vis-OCT almost exclusively detects multiple-scattered photons in whole blood. Meanwhile, photons mostly forward scatter in whole blood within the visible spectral range, allowing photons to maintain ballistic paths and penetrate deeply, leading to a reduction in the measured scattering coefficient. We defined a scattering scaling factor (SSF) to account for such a reduction and found that SSF varied with measurement conditions, such as numerical aperture, depth resolution, and depth selection. We further experimentally validated SSF in ex vivo blood phantoms with pre-set sO2 levels and in the human retina, both of which agreed well with our simulation.
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Affiliation(s)
- Raymond Fang
- Department of Biomedical Engineering, Northwestern University, Evanston IL 60208, USA
- These authors contributed equally to this work
| | - Ian Rubinoff
- Department of Biomedical Engineering, Northwestern University, Evanston IL 60208, USA
- These authors contributed equally to this work
| | - Hao F. Zhang
- Department of Biomedical Engineering, Northwestern University, Evanston IL 60208, USA
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Larrán B, López-Alonso M, Miranda M, Pereira V, Rigueira L, Suárez ML, Herrero-Latorre C. Measuring haemolysis in cattle serum by direct UV-VIS and RGB digital image-based methods. Sci Rep 2022; 12:13523. [PMID: 35941370 PMCID: PMC9360397 DOI: 10.1038/s41598-022-17842-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 08/02/2022] [Indexed: 11/18/2022] Open
Abstract
A simple, rapid procedure is required for the routine detection and quantification of haemolysis, one of the main sources of unreliable results in serum analysis. In this study, we compared two different approaches for the rapid determination of haemolysis in cattle serum. The first consisted of estimating haemolysis via a simple direct ultraviolet-visible (UV-VIS) spectrophotometric measurement of serum samples. The second involved analysis of red, green, blue (RGB) colour data extracted from digital images of serum samples and relating the haemoglobin (Hb) content by means of both univariate (R, G, B and intensity separately) and multivariate calibrations (R, G, B and intensity jointly) using partial least squares regression and artificial neural networks. The direct UV-VIS analysis and RGB-multivariate analysis using neural network methods were both appropriate for evaluating haemolysis in serum cattle samples. The procedures displayed good accuracy (mean recoveries of 100.7 and 102.1%, respectively), adequate precision (with coefficients of variation from 0.21 to 2.68%), limit of detection (0.14 and 0.21 g L-1, respectively), and linearity of up to 10 g L-1.
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Affiliation(s)
- Belén Larrán
- Department of Anatomy, Animal Production and Clinical Veterinary Sciences, Faculty of Veterinary, University of Santiago de Compostela, Campus Terra, 27002, Lugo, Spain
- Veterinary Teaching Hospital "Rof-Codina", Faculty of Veterinary, University of Santiago de Compostela, Campus Terra, 27002, Lugo, Spain
| | - Marta López-Alonso
- Department of Animal Pathology, Faculty of Veterinary, University of Santiago de Compostela, Campus Terra, 27002, Lugo, Spain
| | - Marta Miranda
- Department of Anatomy, Animal Production and Clinical Veterinary Sciences, Faculty of Veterinary, University of Santiago de Compostela, Campus Terra, 27002, Lugo, Spain.
- Veterinary Teaching Hospital "Rof-Codina", Faculty of Veterinary, University of Santiago de Compostela, Campus Terra, 27002, Lugo, Spain.
| | - Víctor Pereira
- Department of Animal Pathology, Faculty of Veterinary, University of Santiago de Compostela, Campus Terra, 27002, Lugo, Spain
| | - Lucas Rigueira
- Department of Anatomy, Animal Production and Clinical Veterinary Sciences, Faculty of Veterinary, University of Santiago de Compostela, Campus Terra, 27002, Lugo, Spain
- Veterinary Teaching Hospital "Rof-Codina", Faculty of Veterinary, University of Santiago de Compostela, Campus Terra, 27002, Lugo, Spain
| | - María Luisa Suárez
- Department of Anatomy, Animal Production and Clinical Veterinary Sciences, Faculty of Veterinary, University of Santiago de Compostela, Campus Terra, 27002, Lugo, Spain
- Veterinary Teaching Hospital "Rof-Codina", Faculty of Veterinary, University of Santiago de Compostela, Campus Terra, 27002, Lugo, Spain
| | - Carlos Herrero-Latorre
- Research Institute on Chemical and Biological Analysis, Analytical Chemistry, Nutrition and Bromatology Department, Faculty of Sciences, University of Santiago de Compostela, Campus Terra, 27002, Lugo, Spain
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Taylor-Williams M, Spicer G, Bale G, Bohndiek SE. Noninvasive hemoglobin sensing and imaging: optical tools for disease diagnosis. JOURNAL OF BIOMEDICAL OPTICS 2022; 27:JBO-220074VR. [PMID: 35922891 PMCID: PMC9346606 DOI: 10.1117/1.jbo.27.8.080901] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 06/27/2022] [Indexed: 05/08/2023]
Abstract
SIGNIFICANCE Measurement and imaging of hemoglobin oxygenation are used extensively in the detection and diagnosis of disease; however, the applied instruments vary widely in their depth of imaging, spatiotemporal resolution, sensitivity, accuracy, complexity, physical size, and cost. The wide variation in available instrumentation can make it challenging for end users to select the appropriate tools for their application and to understand the relative limitations of different methods. AIM We aim to provide a systematic overview of the field of hemoglobin imaging and sensing. APPROACH We reviewed the sensing and imaging methods used to analyze hemoglobin oxygenation, including pulse oximetry, spectral reflectance imaging, diffuse optical imaging, spectroscopic optical coherence tomography, photoacoustic imaging, and diffuse correlation spectroscopy. RESULTS We compared and contrasted the ability of different methods to determine hemoglobin biomarkers such as oxygenation while considering factors that influence their practical application. CONCLUSIONS We highlight key limitations in the current state-of-the-art and make suggestions for routes to advance the clinical use and interpretation of hemoglobin oxygenation information.
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Affiliation(s)
- Michaela Taylor-Williams
- University of Cambridge, Department of Physics, Cavendish Laboratory, Cambridge, United Kingdom, United Kingdom
- University of Cambridge, Cancer Research UK Cambridge Institute, Cambridge, United Kingdom, United Kingdom
| | - Graham Spicer
- University of Cambridge, Department of Physics, Cavendish Laboratory, Cambridge, United Kingdom, United Kingdom
- University of Cambridge, Cancer Research UK Cambridge Institute, Cambridge, United Kingdom, United Kingdom
| | - Gemma Bale
- University of Cambridge, Department of Physics, Cavendish Laboratory, Cambridge, United Kingdom, United Kingdom
- University of Cambridge, Electrical Division, Department of Engineering, Cambridge, United Kingdom, United Kingdom
| | - Sarah E Bohndiek
- University of Cambridge, Department of Physics, Cavendish Laboratory, Cambridge, United Kingdom, United Kingdom
- University of Cambridge, Cancer Research UK Cambridge Institute, Cambridge, United Kingdom, United Kingdom
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36
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Stringer BJ, Shumway SB, Willden JP, Kuck K. Analysis of skew of visible laser reflections in a living sheep heart. JOURNAL OF BIOPHOTONICS 2022; 15:e202100317. [PMID: 34985813 DOI: 10.1002/jbio.202100317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 12/06/2021] [Accepted: 01/02/2022] [Indexed: 06/14/2023]
Abstract
Limited methods exist to confirm the position of cardiovascular devices in the heart. In our earlier work, an optical fiber was enclosed in a central catheter and guided to known positions in the superior vena cava and right atrium in the heart of a living sheep. The tissues were illuminated with two wavelengths of visible light and the reflections were analyzed using frequency domain techniques. In this follow-up work, the data were reanalyzed using statistical estimates of skew and kurtosis as a function of anatomic position. Skew values from a 520 nm laser were able to determine catheter tip position near the cavoatrial junction as validated against known positions previously determined with electrocardiogram and contrast-enhanced video fluoroscopy. This method successfully confirmed the location of the catheter tip at the cavoatrial junction in 84% of 840 trials. Further research with refined apparatus and algorithms on additional animal subjects is strongly suggested.
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Affiliation(s)
- Bradley J Stringer
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah, USA
- Department of Anesthesiology, University of Utah, Salt Lake City, Utah, USA
| | - Spencer B Shumway
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland, USA
| | | | - Kai Kuck
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah, USA
- Department of Anesthesiology, University of Utah, Salt Lake City, Utah, USA
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Synthetic exposure with a CMOS camera for multiple exposure speckle imaging of blood flow. Sci Rep 2022; 12:4708. [PMID: 35304556 PMCID: PMC8933569 DOI: 10.1038/s41598-022-08647-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Accepted: 03/04/2022] [Indexed: 11/09/2022] Open
Abstract
Speckle contrast imaging is an established technique to obtain relative blood flow maps over wide fields of view. A major improvement of the method relies on the acquisition of raw speckle images at different exposure times but requires simultaneous modulation of a laser pulse in duration and intensity and precise synchronization with a camera. This complex instrumentation has limited the use of multiple exposure speckle imaging. We evaluate here the use of a CMOS camera for a simplified approach based on synthetic exposure images created from the sum of successive frames acquired at a 1 ms exposure time. Both methods have been applied to evaluate controlled flows in micro-channels. The contribution of noises to the speckle contrast have been quantified and compared. Dark, readout and shot noise contributions to the total contrast remain constant for modulated exposure, while all these contributions decrease with increasing exposure time for synthetic exposure. The relative contribution of noises to speckle contrast depends on the level of illumination and the exposure time. Guidelines for flow measurements and limitations of the use of a CMOS camera with a limited frame rate for synthetic exposure acquisition scheme are discussed. The synthetic exposure method is simple to implement and should facilitate the translation of multiple exposure speckle imaging to clinical set-ups.
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38
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Reiche MA, Aaron JS, Boehm U, DeSantis MC, Hobson CM, Khuon S, Lee RM, Chew TL. When light meets biology - how the specimen affects quantitative microscopy. J Cell Sci 2022; 135:274812. [PMID: 35319069 DOI: 10.1242/jcs.259656] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Fluorescence microscopy images should not be treated as perfect representations of biology. Many factors within the biospecimen itself can drastically affect quantitative microscopy data. Whereas some sample-specific considerations, such as photobleaching and autofluorescence, are more commonly discussed, a holistic discussion of sample-related issues (which includes less-routine topics such as quenching, scattering and biological anisotropy) is required to appropriately guide life scientists through the subtleties inherent to bioimaging. Here, we consider how the interplay between light and a sample can cause common experimental pitfalls and unanticipated errors when drawing biological conclusions. Although some of these discrepancies can be minimized or controlled for, others require more pragmatic considerations when interpreting image data. Ultimately, the power lies in the hands of the experimenter. The goal of this Review is therefore to survey how biological samples can skew quantification and interpretation of microscopy data. Furthermore, we offer a perspective on how to manage many of these potential pitfalls.
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Affiliation(s)
- Michael A Reiche
- Advanced Imaging Center, Howard Hughes Medical Institute Janelia Research Campus, Ashburn, VA 20147, USA
| | - Jesse S Aaron
- Advanced Imaging Center, Howard Hughes Medical Institute Janelia Research Campus, Ashburn, VA 20147, USA
| | - Ulrike Boehm
- Advanced Imaging Center, Howard Hughes Medical Institute Janelia Research Campus, Ashburn, VA 20147, USA
| | - Michael C DeSantis
- Light Microscopy Facility, Howard Hughes Medical Institute Janelia Research Campus, Ashburn, VA 20147,USA
| | - Chad M Hobson
- Advanced Imaging Center, Howard Hughes Medical Institute Janelia Research Campus, Ashburn, VA 20147, USA
| | - Satya Khuon
- Advanced Imaging Center, Howard Hughes Medical Institute Janelia Research Campus, Ashburn, VA 20147, USA.,Howard Hughes Medical Institute Janelia Research Campus, Ashburn, VA 20147, USA
| | - Rachel M Lee
- Advanced Imaging Center, Howard Hughes Medical Institute Janelia Research Campus, Ashburn, VA 20147, USA
| | - Teng-Leong Chew
- Advanced Imaging Center, Howard Hughes Medical Institute Janelia Research Campus, Ashburn, VA 20147, USA.,Light Microscopy Facility, Howard Hughes Medical Institute Janelia Research Campus, Ashburn, VA 20147,USA
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Flikier S, Flikier D, Flikier B, Wu L. Multimodal imaging of valsalva petaloid maculopathy secondary to acute laryngospasm and endotracheal intubation. Eur J Ophthalmol 2022. [DOI: 10.1177/11206721211032515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Purpose: To report the multimodal imaging findings associated to Valsalva retinopathy following acute laryngospasm and endotracheal intubation. Methods: Case report and literature review. Results: Acute laryngospasm led to pulmonary edema which necessitated endotracheal intubation. Upon extubation the patient complained of bilateral scotomata due to Valsalva retinopathy. Multimodal imaging localizes the precise anatomic site of the intraocular hemorrhages. Petaloid hemorrhages are typical of Henle fiber layer involvement. All the hemorrhages spontaneously cleared without any sequelae. Conclusion: Patients with acute laryngospasm and endotracheal intubation may develop Valsalva retinopathy. Multimodal imaging localize the hemorrhages to the specific anatomic site which is important in determining the different management options.
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Affiliation(s)
| | | | | | - Lihteh Wu
- Asociados de Macula Vitreo y Retina de Costa Rica, San José, Costa Rica
- Illinois Eye and Ear Infirmary, Department of Ophthalmology, University of Illinois School of Medicine Chicago, Chicago, IL, USA
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40
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Ponomarev IV, Topchiy SB, Pushkareva AE. Numerical Modeling of The Dysplastic Vessel Heating in PWS by Yellow 578 nm Copper Vapor Laser Radiation for Different Skin Phototypes. J Lasers Med Sci 2022; 13:e11. [DOI: 10.34172/jlms.2022.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 08/25/2021] [Indexed: 11/09/2022]
Abstract
Introduction: Many clinical studies and protocols have been written about laser treatment for fair skin phototypes. However, for dark-skinned phototypes, information is limited, and the risk of burns is higher, especially if the same settings are recommended for fair skin. Competitive epidermal melanin absorption decreases the light energy reaching dysplastic vessels in a port-wine stain (PWS), preventing the vessel from achieving the temperature of the desired clinical result. Therefore, the choice of safe laser settings for different skin phototypes can be realized using numerical modeling of PWS vessel heating. This study aimed to demonstrate the algorithm for choosing both effective and safe photodestruction of dilated dermal vessels in PWS with the copper vapor laser (CVL) at 578 nm for different skin phototypes. Methods: We used the multilayered skin model with different melanin content for detecting the safe laser parameters for PWS treatment. The calculation of the selective heating of the vascular component with CVL radiation at yellow 578-nm wavelengths for different skin phototypes was performed via Matlab mathematical programming system and its application Femlab for solving partial differential equations using the Finite element method. Results: We determined the location, depth, and size of blood vessels that could be selectively heated to coagulation temperature for different skin prototypes. CVL fluence values need to be reduced almost two times for skin phototype IV than for skin phototype II to provide safe CVL treatment. The maximum depth of the location of the vessels, which can be selectively heated to coagulation temperature, also decreased for dark skin phototypes. Histological and histochemical findings validated the results of our calculations. Conclusion: To our knowledge, the use of numerical simulation to optimize has not yet been considered. According to our calculations, CVL could selectively heat the dilated vessel, which occurred in purple and proliferative-type PWS for dark skin at the reduced fluence range and depth.
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Affiliation(s)
- Igor V. Ponomarev
- P.N. Lebedev Physics Institute, RAS, 53, Leninskiy Prospect, Moscow, 119991, Russian Federation
| | - Sergey B. Topchiy
- P.N. Lebedev Physics Institute, RAS, 53, Leninskiy Prospect, Moscow, 119991, Russian Federation
| | - Alexandra E. Pushkareva
- Saint Petersburg National Research ITMO University; 49, Kronverkskiy Prospect, St. Petersburg, 197101, Russian Federation
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Abstract
Photoacoustic (PA) imaging is able to provide extremely high molecular
contrast while maintaining the superior imaging depth of ultrasound (US)
imaging. Conventional microscopic PA imaging has limited access to deeper tissue
due to strong light scattering and attenuation. Endoscopic PA technology enables
direct delivery of excitation light into the interior of a hollow organ or
cavity of the body for functional and molecular PA imaging of target tissue.
Various endoscopic PA probes have been developed for different applications,
including the intravascular imaging of lipids in atherosclerotic plaque and
endoscopic imaging of colon cancer. In this paper, the authors review
representative probe configurations and corresponding preclinical applications.
In addition, the potential challenges and future directions of endoscopic PA
imaging are discussed.
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Affiliation(s)
- Yan Li
- Beckman Laser Institute, University of California Irvine,
Irvine, CA 92617, USA
| | - Gengxi Lu
- Roski Eye Institute, Keck School of Medicine, University of
Southern California, Los Angeles, CA 90033, USA
| | - Qifa Zhou
- Roski Eye Institute, Keck School of Medicine, University of
Southern California, Los Angeles, CA 90033, USA
| | - Zhongping Chen
- Beckman Laser Institute, University of California Irvine,
Irvine, CA 92617, USA
- The Edwards Lifesciences Center for Cardiovascular
Technology, University of California Irvine, Irvine, CA 92617, USA
- Department of Biomedical Engineering, University of
California Irvine, Irvine, CA 92697, USA
- Correspondence:
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42
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Shen CH, Chen WL, Wu JJ. Research on Multiple Spectral Ranges with Deep Learning for SpO 2 Measurement. SENSORS (BASEL, SWITZERLAND) 2022; 22:s22010328. [PMID: 35009870 PMCID: PMC8749643 DOI: 10.3390/s22010328] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Revised: 12/28/2021] [Accepted: 12/30/2021] [Indexed: 06/12/2023]
Abstract
Oxyhemoglobin saturation by pulse oximetry (SpO2) has always played an important role in the diagnosis of symptoms. Considering that the traditional SpO2 measurement has a certain error due to the number of wavelengths and the algorithm and the wider application of machine learning and spectrum combination, we propose to use 12-wavelength spectral absorption measurement to improve the accuracy of SpO2 measurement. To investigate the multiple spectral regions for deep learning for SpO2 measurement, three datasets for training and verification were built, which were constructed over the spectra of first region, second region, and full region and their sub-regions, respectively. For each region under the procedures of optimization of our model, a thorough of investigation of hyperparameters is proceeded. Additionally, data augmentation is preformed to expand dataset with added noise randomly, increasing the diversity of data and improving the generalization of the neural network. After that, the established dataset is input to a one dimensional convolution neural network (1D-CNN) to obtain a measurement model of SpO2. In order to enhance the model accuracy, GridSearchCV and Bayesian optimization are applied to optimize the hyperparameters. The optimal accuracies of proposed model optimized by GridSearchCV and Bayesian Optimization is 89.3% and 99.4%, respectively, and trained with the dataset at the spectral region of six wavelengths including 650 nm, 680 nm, 730 nm, 760 nm, 810 nm, 860 nm. The total relative error of the best model is only 0.46%, optimized by Bayesian optimization. Although the spectral measurement with more features can improve the resolution ability of the neural network, the results reveal that the training with the dataset of the shorter six wavelength is redundant. This analysis shows that it is very important to construct an effective 1D-CNN model area for spectral measurement using the appropriate spectral ranges and number of wavelengths. It shows that our proposed 1D-CNN model gives a new and feasible approach to measure SpO2 based on multi-wavelength.
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43
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Artemov SA, Belyaev AN, Bushukina OS, Khrushchalina SA, Kostin SV, Lyapin AA, Ryabochkina PA, Taratynova AD. Morphological changes of veins and perivenous tissues during endovenous laser coagulation using 2-μm laser radiation and various types of optical fibers. J Vasc Surg Venous Lymphat Disord 2021; 10:749-757. [PMID: 34506961 DOI: 10.1016/j.jvsv.2021.08.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Accepted: 08/23/2021] [Indexed: 01/08/2023]
Abstract
OBJECTIVE To determine the morphological changes in veins and perivenous tissues after endovenous laser coagulation (EVLC) using laser radiation with a wavelength of 1910 nm and different types of fibers (bare tip and radial). METHODS The EVLC procedure was carried out on 22 surface veins of six sheep. The radiation source was a diode-pumped solid-state laser, which was based on a LiYF4:Tm crystal and had an emission wavelength of 1910 nm and a maximum output power of 10 W. Two types of optical fibers were used: (1) bare tip and (2) radial or radial with two rings. Histological and morphometric methods were used, and the statistical digital data were analyzed. RESULTS The use of a linear endovenous energy density of 20 J/cm and optical bare fibers for veins with diameters of 3-4 mm resulted in a slit-shaped or wide venous wall perforation. A thermal effect was observed on the perivenous connective tissue (PVCT), which caused damage to its structures. Wide perforations were accompanied by complete destruction of the PVCT in the projection of the formed defect. The distance between the remaining vein wall fragment, located opposite to the perforation, and injured small vessels was 257.7 ± 23.6 μm. The radius of thermal damage increased to 2073.5 ± 8.0 μm near the vessel perforation. Using optical radial fibers for veins with diameters of 3.9 ± 0.5 mm did not lead to perforations. The destructive effect of the laser on small vessels of the PVCT extended to a distance of 425.7 ± 22.0 μm. CONCLUSIONS Analysis of thermal vessel damage in perivenous tissue after EVLC with bare-tip fiber shows that in the projection of a wide perforation, the damaged vessels of the PVCT are located at a large distance from the coagulated vein wall. On the opposite side of the perforation, the distance from the coagulated vein wall to the damaged vessels of the PVCT is significantly reduced because of the minimal output of laser radiation energy through the poorly damaged part of the wall. Using an optical radial fiber facilitates the application of a uniform distribution of thermal energy to the vein wall and damage to all its layers; at the same time, it minimizes the thermal energy that extends beyond the vein wall and damages the surrounding tissue. CLINICAL RELEVANCE The use of radiation with a wavelength of 1910 nm will make it possible to carry out endovenous laser coagulation of varicose veins at lower power values compared with radiation in the micron and one and a half micron regions of the spectrum. Understanding of morphological changes of veins and perivenous tissues after endovenous laser coagulation with 1910-nm laser radiation and different types of optical fibers (bare-tip, radial, radial 2ring) help predict possible complications and reduce their rate.
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Affiliation(s)
- Sergey A Artemov
- Physics and Chemistry Institute, National Research Ogarev Mordovia State University, Saransk, Russia
| | - Alexander N Belyaev
- MedicIne Institute, National Research Ogarev Mordovia State University, Saransk, Russia
| | - Olga S Bushukina
- Agriculture Institute, National Research Ogarev Mordovia State University, Saransk, Russia
| | - Svetlana A Khrushchalina
- Physics and Chemistry Institute, National Research Ogarev Mordovia State University, Saransk, Russia
| | - Sergey V Kostin
- MedicIne Institute, National Research Ogarev Mordovia State University, Saransk, Russia
| | - Andrey A Lyapin
- Physics and Chemistry Institute, National Research Ogarev Mordovia State University, Saransk, Russia
| | - Polina A Ryabochkina
- Physics and Chemistry Institute, National Research Ogarev Mordovia State University, Saransk, Russia.
| | - Alina D Taratynova
- Physics and Chemistry Institute, National Research Ogarev Mordovia State University, Saransk, Russia
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Gon M, Ito S, Tanaka K, Chujo Y. Design Strategies and Recent Results for Near-Infrared-Emissive Materials Based on Element-Block π-Conjugated Polymers. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20210235] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Masayuki Gon
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Shunichiro Ito
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Kazuo Tanaka
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Yoshiki Chujo
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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45
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Romanos GE, Tedesco RW, Malhotra U, Hong H, Hou W, Delgado-Ruiz R. Diode Laser Light Scattering and Temperature Changes Due to Anesthesia Injection in Bovine Tongue Mucosa. Photobiomodul Photomed Laser Surg 2021; 39:587-592. [DOI: 10.1089/photob.2020.4989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Affiliation(s)
- Georgios E. Romanos
- Laboratory for Periodontal-, Implant- and Phototherapy (LA-PIP), Department of Periodontology, School of Dental Medicine, School of Dental Medicine, Stony Brook University, Stony Brook, New York, USA
| | - Rocco W. Tedesco
- Laboratory for Periodontal-, Implant- and Phototherapy (LA-PIP), Department of Periodontology, School of Dental Medicine, School of Dental Medicine, Stony Brook University, Stony Brook, New York, USA
| | - Upasna Malhotra
- Laboratory for Periodontal-, Implant- and Phototherapy (LA-PIP), Department of Periodontology, School of Dental Medicine, School of Dental Medicine, Stony Brook University, Stony Brook, New York, USA
| | - Houlin Hong
- Department of Family, Population and Preventive Medicine, School of Medicine, School of Dental Medicine, Stony Brook University, Stony Brook, New York, USA
| | - Wei Hou
- Department of Family, Population and Preventive Medicine, School of Medicine, School of Dental Medicine, Stony Brook University, Stony Brook, New York, USA
| | - Rafael Delgado-Ruiz
- Department of Prosthodontics and Digital Technology, School of Dental Medicine, Stony Brook University, Stony Brook, New York, USA
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46
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Stringer BJ, Shumway SB, Willden JP, Kuck K. Joint time-frequency analysis of visible laser reflections in a sheep heart. JOURNAL OF BIOPHOTONICS 2021; 14:e202000464. [PMID: 33934517 DOI: 10.1002/jbio.202000464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 04/17/2021] [Accepted: 04/22/2021] [Indexed: 06/12/2023]
Abstract
Limited methods exist to confirm the position of cardiovascular devices in the superior vena cava or right atrium of the heart. The aim of this study was to design, test and validate the feasibility of whether an optical fiber-based instrument could accurately distinguish when a cardiovascular catheter was located in the superior vena cava vs in the right atrium. An optical fiber was placed in a cardiovascular catheter which was inserted into a living sheep and guided to the vicinity of the heart where diode laser-based reflection intensity data were simultaneously gathered from two visible wavelengths of light reflected from the venous and atrial tissue surfaces near the cavoatrial junction. The time series data were postoperatively analyzed using methods of joint time-frequency analysis and validated against catheter positions determined with fluoroscopy and ECG. The system was successful in distinguishing the location of the superior vena cava from the right atrium.
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Affiliation(s)
- Bradley J Stringer
- Verum TCS, LLC, Ridgefield, Washington, USA
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah, USA
- Department of Anesthesiology, University of Utah, Salt Lake City, Utah, USA
| | | | | | - Kai Kuck
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah, USA
- Department of Anesthesiology, University of Utah, Salt Lake City, Utah, USA
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47
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Tseng SH, Liang BJ, Wang W, Tsai BX, Hu PS. Monitoring adaptation of skin tissue oxygenation during cycling ergometer exercise by frequency-domain diffuse optical spectroscopy. BIOMEDICAL OPTICS EXPRESS 2021; 12:5023-5035. [PMID: 34513240 PMCID: PMC8407841 DOI: 10.1364/boe.428207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 07/04/2021] [Accepted: 07/09/2021] [Indexed: 06/13/2023]
Abstract
In addition to supplying oxygen molecule O2 for metabolic functions during the adaptation to exercise, blood also plays a critical role in heat dissipation for core temperature stabilization. This study investigates the status of hemodynamic oxygenation in the forearm's skin tissue of three participants during a complete ergometer exercise from the resting to exercising, and to recovering conditions using a three-wavelength frequency-domain diffuse reflectance spectroscopy (FD DRS) alongside the monitoring of heartbeat rate and skin temperature. The FD DRS system was synchronized with radiofrequency (RF)-modulated input photon sources and the respective output to extract time-course absorption and scattering coefficients of the skin tissue, which, through the fitting of lambert's law of absorbance, can be used to determine the concentration of oxygenated/deoxygenated hemoglobin molecules, and consequentially, the oxygen saturation of skin tissue and total hemoglobin (THb) concentration. Expressly, a sudden jump in heartbeat rate at the beginning of the exercise, a temporal lag of the rising edge of skin temperature behind that of the THb concentration in the procession of step-wise incremental working intensity, and the uprising of THb in the exhaustion zone in responses to the physiological adaptation to exercise were identified. Finally, conclusive remarks were drawn that the FD DRS system is useful in extracting the hemodynamic properties of forearm skin which is often being neglected in previous exercise physiology studies by DRS-related techniques. The detailed variation of hemodynamic and optical scattering parameters of forearm skin elucidated in the studies can be applied for the analysis of athletes' physiological status, and may be a potential reference for the design of future wearable devices.
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Affiliation(s)
- Sheng-Hao Tseng
- Department of Photonics, National Cheng Kung University, Tainan, 701, Taiwan
| | - Bo-Jian Liang
- Department of Photonics, National Cheng Kung University, Tainan, 701, Taiwan
| | - Wen Wang
- Department of Photonics, National Cheng Kung University, Tainan, 701, Taiwan
| | - Bo-Xiang Tsai
- College of Photonics, National Yang Ming Chiao Tung University, Tainan, 71150, Taiwan
| | - Po-Sheng Hu
- College of Photonics, National Yang Ming Chiao Tung University, Tainan, 71150, Taiwan
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48
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Monterano Mesquita G, Patel D, Chang YC, Cabot F, Ruggeri M, Yoo SH, Ho A, Parel JMA, Manns F. In vivo measurement of the attenuation coefficient of the sclera and ciliary muscle. BIOMEDICAL OPTICS EXPRESS 2021; 12:5089-5106. [PMID: 34513244 PMCID: PMC8407821 DOI: 10.1364/boe.427286] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 06/30/2021] [Accepted: 07/08/2021] [Indexed: 06/13/2023]
Abstract
We acquired 1325 nm OCT images of the sclera and ciliary muscle of human subjects. The attenuation coefficients of the sclera and ciliary muscle were determined from a curve fit of the average intensity profile of about 100 A-lines in a region of interest after correction for the effect of beam geometry, using a single scattering model. The average scleral attenuation coefficient was 4.13 ± 1.42 mm-1 with an age-related decrease that was near the threshold for statistical significance (p = 0.053). The average ciliary muscle attenuation coefficient was 1.72 ± 0.88 mm-1, but this value may be an underestimation due to contributions from multiple scattering. Overall, the results suggest that inter-individual variations in scleral attenuation contribute to variability in the quality of transscleral OCT images of the ciliary muscle and the outcome of transscleral laser therapies.
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Affiliation(s)
- Gabrielle Monterano Mesquita
- Ophthalmic Biophysics Center, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL 33136, USA
- Department of Biomedical Engineering, University of Miami College of Engineering, Coral Gables, FL 33146, USA
| | - Disha Patel
- Ophthalmic Biophysics Center, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL 33136, USA
- Department of Biomedical Engineering, University of Miami College of Engineering, Coral Gables, FL 33146, USA
| | - Yu-Cherng Chang
- Ophthalmic Biophysics Center, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL 33136, USA
- Department of Biomedical Engineering, University of Miami College of Engineering, Coral Gables, FL 33146, USA
| | - Florence Cabot
- Ophthalmic Biophysics Center, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Marco Ruggeri
- Ophthalmic Biophysics Center, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL 33136, USA
- Department of Biomedical Engineering, University of Miami College of Engineering, Coral Gables, FL 33146, USA
| | - Sonia H. Yoo
- Ophthalmic Biophysics Center, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL 33136, USA
- Department of Biomedical Engineering, University of Miami College of Engineering, Coral Gables, FL 33146, USA
| | - Arthur Ho
- Ophthalmic Biophysics Center, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL 33136, USA
- Department of Biomedical Engineering, University of Miami College of Engineering, Coral Gables, FL 33146, USA
- Brien Holden Vision Institute, Sydney, NSW 2052, Australia
- School of Optometry and Vision Science, University of New South Wales, Sydney, NSW 2033, Australia
| | - Jean-Marie A. Parel
- Ophthalmic Biophysics Center, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL 33136, USA
- Department of Biomedical Engineering, University of Miami College of Engineering, Coral Gables, FL 33146, USA
- Brien Holden Vision Institute, Sydney, NSW 2052, Australia
| | - Fabrice Manns
- Ophthalmic Biophysics Center, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL 33136, USA
- Department of Biomedical Engineering, University of Miami College of Engineering, Coral Gables, FL 33146, USA
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49
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Zhao W, Yu H, Wen Y, Luo H, Jia B, Wang X, Liu L, Li WJ. Real-time red blood cell counting and osmolarity analysis using a photoacoustic-based microfluidic system. LAB ON A CHIP 2021; 21:2586-2593. [PMID: 34008680 DOI: 10.1039/d1lc00263e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Counting the number of red blood cells (RBCs) in blood samples is a common clinical diagnostic procedure, but conventional methods are unable to provide the size and other physical properties of RBCs at the same time. In this work, we explore photoacoustic (PA) detection as a rapid label-free and noninvasive analysis technique that can potentially be used for single RBC characterization based on their photoabsorption properties. We have demonstrated an on-chip PA flow cytometry system using a simple microfluidic chip combined with a PA imaging system to count and characterize up to ∼60 RBCs per second. Compared with existing microfluidic-based RBC analysis methods, which typically use camera-captured image sequences to characterize cell morphology and deformation, the PA method discussed here requires only the processing of one-dimensional time-series data instead of two- or three-dimensional time-series data acquired by computer vision methods. Therefore, the PA method will have significantly lower computational requirements when large numbers of RBCs are to be analyzed. Moreover, we have demonstrated that the PA signals of RBCs flowing in a microfluidic device could be directly used to acquire the osmolarity conditions (in the range of 124 to 497 mOsm L-1) of the medium surrounding the RBCs. This finding suggests a potential extension of applicability to blood tests via PA-based biomedical detection.
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Affiliation(s)
- Wenxiu Zhao
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China. and Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110016, China and University of Chinese Academy of Sciences, Beijing 100049, China
| | - Haibo Yu
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China. and Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110016, China
| | - Yangdong Wen
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China. and Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110016, China and University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hao Luo
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China. and Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110016, China and University of Chinese Academy of Sciences, Beijing 100049, China
| | - Boliang Jia
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, SAR, China.
| | - Xiaoduo Wang
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China. and Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110016, China
| | - Lianqing Liu
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China. and Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110016, China
| | - Wen Jung Li
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China. and Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110016, China and Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, SAR, China.
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50
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Mokrousov MD, Thompson W, Ermilov SA, Abakumova T, Novoselova MV, Inozemtseva OA, Zatsepin TS, Zharov VP, Galanzha EI, Gorin DA. Indocyanine green dye based bimodal contrast agent tested by photoacoustic/fluorescence tomography setup. BIOMEDICAL OPTICS EXPRESS 2021; 12:3181-3195. [PMID: 34221653 PMCID: PMC8221961 DOI: 10.1364/boe.419461] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 04/20/2021] [Accepted: 04/21/2021] [Indexed: 05/08/2023]
Abstract
Multimodal imaging systems are in high demand for preclinical research, experimental medicine, and clinical practice. Combinations of photoacoustic technology with other modalities including fluorescence, ultrasound, MRI, OCT have been already applied in feasibility studies. Nevertheless, only the combination of photoacoustics with ultrasound in a single setup is commercially available now. A combination of photoacoustics and fluorescence is another compelling approach because those two modalities naturally complement each other. Here, we presented a bimodal contrast agent based on the indocyanine green dye (ICG) as a single signalling compound embedded in the biocompatible and biodegradable polymer shell. We demonstrate its remarkable characteristics by imaging using a commercial photoacoustic/fluorescence tomography system (TriTom, PhotoSound Technologies). It was shown that photoacoustic signal of the particles depends on the amount of dye loaded into the shell, while fluorescence signal depends on the total amount of dye per particle. For the first time to our knowledge, a commercial bimodal photoacoustic/fluorescence setup was used for characterization of ICG doped polymer particles. Additionally, we conducted cell toxicity studies for these particles as well as studied biodistribution over time in vivo and ex vivo using fluorescent imaging. The obtained results suggest a potential for the application of biocompatible and biodegradable bimodal contrast agents as well as the integrated photoacoustic/fluorescence imaging system for preclinical and clinical studies.
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Affiliation(s)
- Maksim D. Mokrousov
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, Moscow, 121205, Russia
| | - Weylan Thompson
- PhotoSound Technologies, 9511 Town Park Dr, Houston, TX 77036, USA
| | | | - Tatiana Abakumova
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, Moscow, 121205, Russia
| | - Marina V. Novoselova
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, Moscow, 121205, Russia
| | | | - Timofei S. Zatsepin
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, Moscow, 121205, Russia
- Department of Chemistry, Lomonosov Moscow State University, Leninskie gory 1/3, Moscow, 119991, Russia
| | - Vladimir P. Zharov
- University of Arkansas for Medical Sciences, 4301 W. Markham St. Little Rock, AR 72205, USA
| | - Ekaterina I. Galanzha
- University of Arkansas for Medical Sciences, 4301 W. Markham St. Little Rock, AR 72205, USA
| | - Dmitry A. Gorin
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, Moscow, 121205, Russia
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