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Perkov S, Makhortov M, Grishin O, Perevoschikov S, Prikhozhdenko ES, Bratashov D, Gorin D. Optoacoustic monitoring of bilirubin photodegradation. JOURNAL OF BIOPHOTONICS 2023; 16:e202200339. [PMID: 37345342 DOI: 10.1002/jbio.202200339] [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: 11/05/2022] [Revised: 05/14/2023] [Accepted: 06/02/2023] [Indexed: 06/23/2023]
Abstract
Hematomas resulted from trauma are very common, and the efficacy of existing treatment techniques is limited. Phototherapy can be used to expedite healing and improve the appearance of the damaged tissue. Efficient phototherapy requires determination of chromophore composition in hematoma, which can be provided by the optoacoustic (OA) technique, as it combines high spatial resolution and optical contrast. Here, we conducted experiments on photodegradation of bilirubin in gelatin slin phantoms. We have demonstrated that the OA technique allows monitoring of bilirubin concentration during photodegradation, and also distinguishing bilirubin concentration in depth. The obtained results suggest that OA monitoring may be used for efficient hematoma phototherapy.
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Affiliation(s)
- Sergei Perkov
- Photonics Center, Skolkovo Institute of Science and Technology, Moscow, Russia
| | | | - Oleg Grishin
- Science Medical Center, Saratov State University, Saratov, Russia
| | | | | | - Daniil Bratashov
- Science Medical Center, Saratov State University, Saratov, Russia
| | - Dmitry Gorin
- Photonics Center, Skolkovo Institute of Science and Technology, Moscow, Russia
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2
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Dolganova IN, Zotov AK, Safonova LP, Aleksandrova PV, Reshetov IV, Zaytsev KI, Tuchin VV, Kurlov VN. Feasibility test of a sapphire cryoprobe with optical monitoring of tissue freezing. JOURNAL OF BIOPHOTONICS 2023; 16:e202200288. [PMID: 36510652 DOI: 10.1002/jbio.202200288] [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: 09/19/2022] [Revised: 11/22/2022] [Accepted: 11/29/2022] [Indexed: 06/17/2023]
Abstract
This article describes a sapphire cryoprobe as a promising solution to the significant problem of modern cryosurgery that is the monitoring of tissue freezing. This probe consists of a sapphire rod manufactured by the edge-defined film-fed growth technique from Al2 O3 melt and optical fibers accommodated inside the rod and connected to the source and the detector. The probe's design enables detection of spatially resolved diffuse reflected intensities of tissue optical response, which are used for the estimation of tissue freezing depth. The current type of the 12.5-mm diameter sapphire probe cooled down by the liquid nitrogen assumes a superficial cryoablation. The experimental test made by using a gelatin-intralipid tissue phantom shows the feasibility of such concept, revealing the capabilities of monitoring the freezing depth up to 10 mm by the particular instrumentation realization of the probe. This justifies a potential of sapphire-based instruments aided by optical diagnosis in modern cryosurgery.
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Affiliation(s)
- Irina N Dolganova
- Osipyan Institute of Solid State Physics of the Russian Academy of Sciences, Chernogolovka, Russia
| | - Arsen K Zotov
- Osipyan Institute of Solid State Physics of the Russian Academy of Sciences, Chernogolovka, Russia
| | | | - Polina V Aleksandrova
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia
| | - Igor V Reshetov
- Institute for Cluster Oncology, Sechenov University, Moscow, Russia
| | - Kirill I Zaytsev
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia
| | - Valery V Tuchin
- Science Medical Center, Saratov State University, Saratov, Russia
- Institute of Precision Mechanics and Control, FRC "Saratov Scientific Centre of the Russian Academy of Sciences", Saratov, Russia
- Tomsk State University, Tomsk, Russia
| | - Vladimir N Kurlov
- Osipyan Institute of Solid State Physics of the Russian Academy of Sciences, Chernogolovka, Russia
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Cvjetinovic J, Merdalimova AA, Kirsanova MA, Somov PA, Nozdriukhin DV, Salimon AI, Korsunsky AM, Gorin DA. A SERS platform based on diatomite modified by gold nanoparticles using a combination of layer-by-layer assembly and a freezing-induced loading method. Phys Chem Chem Phys 2022; 24:8901-8912. [PMID: 35363241 DOI: 10.1039/d2cp00647b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Siliceous diatom frustules represent an up-and-coming platform for a range of bio-assisted nanofabrication processes able to overcome the complexity and high cost of current engineering technology solutions in terms of negligibly small power consumption and environmentally friendly processing combined with unique highly porous structures and properties. Herein, the modification of diatomite - a soft, loose, and fine-grained siliceous sedimentary rock composed of the remains of fossilized diatoms - with gold nanoparticles using layer-by-layer technology in combination with a freezing-induced loading approach is demonstrated. The obtained composite structures are characterized by dynamic light scattering, extinction spectroscopy, scanning (SEM) and transmission electron microscopy (TEM), and photoacoustic imaging techniques, and tested as a platform for surface-enhanced Raman scattering (SERS) using Rhodamine 6G. SEM, TEM, and energy dispersive X-ray spectroscopy (EDX) confirmed a dense coating of gold nanoparticles with an average size of 19 nm on the surface of the diatomite and within the pores. The photoacoustic signal excited at a wavelength of 532 nm increases with increasing loading cycles of up to three polyelectrolyte-gold nanoparticle bilayers. The hybrid materials based on diatomite modified with gold nanoparticles can be used as SERS substrates, but also as biosensors, catalysts, and platforms for advanced bioimaging.
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Affiliation(s)
- Julijana Cvjetinovic
- Center for Photonic Science and Engineering, Skolkovo Institute of Science and Technology, 3 Nobel Str., Moscow, 121205, Russia.
| | - Anastasiia A Merdalimova
- Center for Photonic Science and Engineering, Skolkovo Institute of Science and Technology, 3 Nobel Str., Moscow, 121205, Russia.
| | - Maria A Kirsanova
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, 3 Nobel Str., Moscow, 121205, Russia
| | - Pavel A Somov
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, 3 Nobel Str., Moscow, 121205, Russia
| | - Daniil V Nozdriukhin
- Center for Photonic Science and Engineering, Skolkovo Institute of Science and Technology, 3 Nobel Str., Moscow, 121205, Russia.
| | - Alexey I Salimon
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, 3 Nobel Str., Moscow, 121205, Russia
| | | | - Dmitry A Gorin
- Center for Photonic Science and Engineering, Skolkovo Institute of Science and Technology, 3 Nobel Str., Moscow, 121205, Russia.
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Ikematsu H, Ishihara M, Okawa S, Minamide T, Mitsui T, Kuwata T, Ito M, Kinoshita T, Fujita T, Yano T, Omori T, Ozawa S, Murakoshi D, Irisawa K, Ochiai A. Photoacoustic imaging of fresh human surgically and endoscopically resected gastrointestinal specimens. DEN OPEN 2022; 2:e28. [PMID: 35310764 PMCID: PMC8828192 DOI: 10.1002/deo2.28] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 05/04/2021] [Accepted: 05/12/2021] [Indexed: 11/08/2022]
Abstract
Objective Photoacoustic (PA) imaging is a novel noninvasive technique that offers high‐contrast tomographic imaging with ultrasound‐like resolution at depths of centimeters, enabling visualization of deep small vessels. The aim of this pilot study was to survey the characteristics of deep vessel networks in the mucosa of neoplastic gastrointestinal (GI) lesions using PA imaging. Methods Specimens of patients who had undergone surgical and endoscopic resection for GI lesions were included in this study. The PA/ultrasound imaging system for clinical research is characterized by a technology that can superimpose a PA image over an ultrasound image. Three‐dimensional PA images were acquired for the resected specimen before fixation. The stomach and colon of live pigs were incised, and the walls were scanned from the mucosa. Results A total of 32 specimens (nine esophageal, 12 gastric, 11 colorectal) were scanned. The pathological diagnoses were adenomas (n = 2), intramucosal cancers (n = 14), and invasive cancers (n = 16). The deep vessel networks of all lesions could be visualized. In the intramucosal lesions, the deep vessel network was similar to that of a normal tissue. In invasive cancers, the thick and prominent vessel network was visible in the surface layer of esophageal cancers, infiltrated area of gastric cancers, and surface layer and infiltrated area of colorectal cancers. In the images of living pigs, visualizing the vascular network deeper than the submucosa in both the stomach and large intestine was possible. Conclusion Our study confirmed that the deep vessel networks of neoplastic GI lesions were visible by PA imaging.
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Affiliation(s)
- Hiroaki Ikematsu
- Division of Science and Technology for Endoscopy Exploratory Oncology Research and Clinical Trial Center National Cancer Center Chiba Japan
- Department of Gastroenterology and Endoscopy National Cancer Center Hospital East Chiba Japan
| | - Miya Ishihara
- Department of Medical Engineering National Defense Medical College Saitama Japan
| | - Shinpei Okawa
- Department of Medical Engineering National Defense Medical College Saitama Japan
| | - Tatsunori Minamide
- Department of Gastroenterology and Endoscopy National Cancer Center Hospital East Chiba Japan
| | - Tomohiro Mitsui
- Department of Gastroenterology and Endoscopy National Cancer Center Hospital East Chiba Japan
| | - Takeshi Kuwata
- Department of Pathology and Clinical Laboratories National Cancer Center Hospital East Chiba Japan
| | - Masaaki Ito
- Department of Colorectal Surgery National Cancer Center Hospital East Chiba Japan
| | - Takahiro Kinoshita
- Department of Gastric Surgery National Cancer Center Hospital East Chiba Japan
| | - Takeo Fujita
- Department of Esophageal Surgery National Cancer Center Hospital East Chiba Japan
| | - Tomonori Yano
- Department of Gastroenterology and Endoscopy National Cancer Center Hospital East Chiba Japan
| | - Toshihiko Omori
- Medical Systems Research & Development Center Research & Development Management Headquarters FUJIFILM Corporation Kanagawa Japan
| | - Satoshi Ozawa
- Medical Systems Research & Development Center Research & Development Management Headquarters FUJIFILM Corporation Kanagawa Japan
| | - Dai Murakoshi
- Medical Systems Research & Development Center Research & Development Management Headquarters FUJIFILM Corporation Kanagawa Japan
| | - Kaku Irisawa
- Medical Systems Research & Development Center Research & Development Management Headquarters FUJIFILM Corporation Kanagawa Japan
| | - Atsushi Ochiai
- Exploratory Oncology Research and Clinical Trial Center National Cancer Center Chiba Japan
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Kang J, Liu X, Cao S, Zeiler SR, Graham EM, Boctor EM, Koehler RC. Transcranial photoacoustic characterization of neurovascular physiology during early-stage photothrombotic stroke in neonatal piglets in vivo. J Neural Eng 2022; 18:10.1088/1741-2552/ac4596. [PMID: 34937013 PMCID: PMC9112348 DOI: 10.1088/1741-2552/ac4596] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 12/22/2021] [Indexed: 01/07/2023]
Abstract
OBJECTIVE Perinatal ischemic stroke is estimated to occur in 1/2300-1/5000 live births, but early differential diagnosis from global hypoxia-ischemia is often difficult. In this study, we tested the ability of a hand-held transcranial photoacoustic (PA) imaging probe to non-invasively detect a focal photothrombotic stroke (PTS) within 2 h of stroke onset in a gyrencephalic piglet brain. APPROACH About 17 stroke lesions of approximately 1 cm2area were introduced randomly in anterior or posterior cortex via the light/dye PTS technique in anesthetized neonatal piglets (n= 11). The contralateral non-ischemic region served as control tissue for discrimination contrast for the PA hemoglobin metrics: oxygen saturation, total hemoglobin (tHb), and individual quantities of oxygenated and deoxygenated hemoglobin (HbO2and HbR). MAIN RESULTS The PA-derived tissue oxygen saturation at 2 h yielded a significant separation between control and affected regions-of-interest (p< 0.0001), which were well matched with 24 h post-stroke cerebral infarction confirmed in the triphenyltetrazolium chloride-stained image. The quantity of HbO2also displayed a significant contrast (p= 0.021), whereas tHb and HbR did not. The analysis on receiver operating characteristic curves and multivariate data analysis also agreed with the results above. SIGNIFICANCE This study shows that a hand-held transcranial PA neuroimaging device can detect a regional thrombotic stroke in the cerebral cortex of a neonatal piglet. In particular, we conclude that the oxygen saturation metric can be used alone to identify regional stroke lesions. The lack of change in tHb may be related to arbitrary hand-held imaging configuration and/or entrapment of red blood cells within the thrombotic stroke.
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Affiliation(s)
- Jeeun Kang
- Laboratory for Computational Sensing and Robotics, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD, 21218, United States of America,These authors equally contributed
| | - Xiuyun Liu
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, 21287, United States of America,These authors equally contributed
| | - Suyi Cao
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, 21287, United States of America
| | - Steven R Zeiler
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, United States of America
| | - Ernest M Graham
- Division of Maternal-Fetal Medicine, Department of Gynecology-Obstetrics, Johns Hopkins University School of Medicine, Baltimore, MD 21205, United States of America,Neuroscience Intensive Care Nursery Program, Johns Hopkins University School of Medicine, Baltimore, MD 21205, United States of America
| | - Emad M Boctor
- Laboratory for Computational Sensing and Robotics, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD, 21218, United States of America,Authors to whom any correspondence should be addressed. and
| | - Raymond C Koehler
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, 21287, United States of America,Authors to whom any correspondence should be addressed. and
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Kang J, Koehler RC, Graham EM, Boctor EM. Photoacoustic assessment of the fetal brain and placenta as a method of non-invasive antepartum and intrapartum monitoring. Exp Neurol 2022; 347:113898. [PMID: 34662542 PMCID: PMC8756814 DOI: 10.1016/j.expneurol.2021.113898] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 10/06/2021] [Accepted: 10/12/2021] [Indexed: 11/21/2022]
Abstract
A noninvasive monitor for concurrent evaluation of placental and fetal sagittal sinus sO 2 for both antepartum surveillance at the late 2nd and 3rd trimesters and intrapartum monitoring would be a great advantage over current methods. A PA fetal brain and placental monitor has potential value to rapidly identify the fetus at risk for developing hypoxia and ischemia of a sufficient degree that brain injury or death may develop, which may be prevented by intervention with delivery and other follow-up treatments.
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Affiliation(s)
- Jeeun Kang
- Laboratory for Computational Sensing and Robotics, Whiting School of Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, United States of America; Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD, United States of America
| | - Raymond C Koehler
- Department of Anesthesia and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, United States of America
| | - Ernest M Graham
- Department of Gyn-Ob, Division of Maternal-Fetal Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, United States of America; Neuroscience Intensive Care Nursery Program, Johns Hopkins University School of Medicine; Baltimore, MD, United States of America.
| | - Emad M Boctor
- Laboratory for Computational Sensing and Robotics, Whiting School of Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, United States of America; Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD, United States of America
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Cvjetinovic J, Salimon AI, Novoselova MV, Sapozhnikov PV, Shirshin EA, Yashchenok AM, Kalinina OY, Korsunsky AM, Gorin DA. Photoacoustic and fluorescence lifetime imaging of diatoms. PHOTOACOUSTICS 2020; 18:100171. [PMID: 32435586 PMCID: PMC7229289 DOI: 10.1016/j.pacs.2020.100171] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 01/20/2020] [Accepted: 02/25/2020] [Indexed: 06/11/2023]
Abstract
Photoacoustic and fluorescent methods are used intensely in biology and medicine. These approaches can also be used to investigate unicellular diatom algae that are extremely important for Earth's ecology. They are enveloped within silica frustules (exoskeletons), which can be used in drug delivery systems. Here, we report for the first time the successful application of photoacoustic (PA) and fluorescent visualization of diatoms. Chlorophyll a and c and fucoxanthin were found likely to be responsible for the photoacoustic effect in diatoms. The PA signal was obtained from gel drops containing diatoms and was found to increase with the diatom concentration. The fluorescence lifetime of the diatom chromophores ranged from 0.5 to 2 ns. The dynamic light scattering, absorbance, and SEM characterization techniques were also applied. The results were considered in combination to elucidate the nature of the photoacoustic signal. Possible biotechnological applications are proposed for the remote photoacoustic monitoring of algae.
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Affiliation(s)
- Julijana Cvjetinovic
- Center for Photonics and Quantum Materials, Skolkovo Institute of Science and Technology, 3 Nobelya Str., Moscow, 121205, Russia
| | - Alexey I. Salimon
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, 3 Nobelya Str., Moscow, 121205, Russia
| | - Marina V. Novoselova
- Center for Photonics and Quantum Materials, Skolkovo Institute of Science and Technology, 3 Nobelya Str., Moscow, 121205, Russia
| | - Philipp V. Sapozhnikov
- Shirshov Institute of Oceanology of Russian Academy of Sciences, 36 Nakhimovsky Prospekt, Moscow, 117997, Russia
| | - Evgeny A. Shirshin
- Lomonosov Moscow State University, 1/2 Leninskiye Gory, Moscow, 119991, Russia
- Institute of Spectroscopy of the Russian Academy of Sciences, 5 Fizicheskaya Str., Troitsk, Moscow, 108840, Russia
| | - Alexey M. Yashchenok
- Center for Photonics and Quantum Materials, Skolkovo Institute of Science and Technology, 3 Nobelya Str., Moscow, 121205, Russia
| | - Olga Yu. Kalinina
- Faculty of Geography, Lomonosov Moscow State University, 1 Leninskiye Gory, Moscow, 119991, Russia
| | - Alexander M. Korsunsky
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, 3 Nobelya Str., Moscow, 121205, Russia
- Department of Engineering Science, University of Oxford, Oxford, OX1 3PJ, United Kingdom
| | - Dmitry A. Gorin
- Center for Photonics and Quantum Materials, Skolkovo Institute of Science and Technology, 3 Nobelya Str., Moscow, 121205, Russia
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Pogue BW, Wilson BC. Optical and x-ray technology synergies enabling diagnostic and therapeutic applications in medicine. JOURNAL OF BIOMEDICAL OPTICS 2018; 23:1-17. [PMID: 30350489 PMCID: PMC6197862 DOI: 10.1117/1.jbo.23.12.121610] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 09/24/2018] [Indexed: 05/10/2023]
Abstract
X-ray and optical technologies are the two central pillars for human imaging and therapy. The strengths of x-rays are deep tissue penetration, effective cytotoxicity, and the ability to image with robust projection and computed-tomography methods. The major limitations of x-ray use are the lack of molecular specificity and the carcinogenic risk. In comparison, optical interactions with tissue are strongly scatter dominated, leading to limited tissue penetration, making imaging and therapy largely restricted to superficial or endoscopically directed tissues. However, optical photon energies are comparable with molecular energy levels, thereby providing the strength of intrinsic molecular specificity. Additionally, optical technologies are highly advanced and diversified, being ubiquitously used throughout medicine as the single largest technology sector. Both have dominant spatial localization value, achieved with optical surface scanning or x-ray internal visualization, where one often is used with the other. Therapeutic delivery can also be enhanced by their synergy, where radio-optical and optical-radio interactions can inform about dose or amplify the clinical therapeutic value. An emerging trend is the integration of nanoparticles to serve as molecular intermediates or energy transducers for imaging and therapy, requiring careful design for the interaction either by scintillation or Cherenkov light, and the nanoscale design is impacted by the choices of optical interaction mechanism. The enhancement of optical molecular sensing or sensitization of tissue using x-rays as the energy source is an important emerging field combining x-ray tissue penetration in radiation oncology with the molecular specificity and packaging of optical probes or molecular localization. The ways in which x-rays can enable optical procedures, or optics can enable x-ray procedures, provide a range of new opportunities in both diagnostic and therapeutic medicine. Taken together, these two technologies form the basis for the vast majority of diagnostics and therapeutics in use in clinical medicine.
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Affiliation(s)
- Brian W. Pogue
- Dartmouth College, Thayer School of Engineering, Geisel School of Medicine, Hanover, New Hampshire, United States
| | - Brian C. Wilson
- University of Toronto, Princess Margaret Cancer Centre/University Health Network, Toronto, Ontario, Canada
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Esenaliev RO. Optoacoustic Monitoring of Physiologic Variables. Front Physiol 2017; 8:1030. [PMID: 29311964 PMCID: PMC5732935 DOI: 10.3389/fphys.2017.01030] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2017] [Accepted: 11/28/2017] [Indexed: 11/23/2022] Open
Abstract
Optoacoustic (photoacoustic) technique is a novel diagnostic platform that can be used for noninvasive measurements of physiologic variables, functional imaging, and hemodynamic monitoring. This technique is based on generation and time-resolved detection of optoacoustic (thermoelastic) waves generated in tissue by short optical pulses. This provides probing of tissues and individual blood vessels with high optical contrast and ultrasound spatial resolution. Because the optoacoustic waves carry information on tissue optical and thermophysical properties, detection, and analysis of the optoacoustic waves allow for measurements of physiologic variables with high accuracy and specificity. We proposed to use the optoacoustic technique for monitoring of a number of important physiologic variables including temperature, thermal coagulation, freezing, concentration of molecular dyes, nanoparticles, oxygenation, and hemoglobin concentration. In this review we present origin of contrast and high spatial resolution in these measurements performed with optoacoustic systems developed and built by our group. We summarize data obtained in vitro, in experimental animals, and in humans on monitoring of these physiologic variables. Our data indicate that the optoacoustic technology may be used for monitoring of cerebral blood oxygenation in patients with traumatic brain injury and in neonatal patients, central venous oxygenation monitoring, total hemoglobin concentration monitoring, hematoma detection and characterization, monitoring of temperature, and coagulation and freezing boundaries during thermotherapy.
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Affiliation(s)
- Rinat O Esenaliev
- Laboratory for Optical Sensing and Monitoring, Department of Neuroscience and Cell Biology, Department of Anesthesiology, Center for Biomedical Engineering, University of Texas Medical Branch, Galveston, TX, United States
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