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Karlas, A. ; Kallmayer, M.* ; Fasoula, N.-A. ; Liapis, E. ; Bariotakis, M. ; Krönke, M.* ; Anastasopoulou, M. ; Reber, J. ; Eckstein, H.H.* ; Ntziachristos, V.

Multispectral optoacoustic tomography of muscle perfusion and oxygenation under arterial and venous occlusion: A human pilot study.

J. Biophotonics 13:e201960169 (2020)
Postprint DOI
Open Access Green
Perfusion and oxygenation are critical parameters of muscle metabolism in health and disease. They have been both the target of many studies, in particular using near-infrared spectroscopy (NIRS). However, difficulties with quantifying NIRS signals have limited a wide dissemination of the method to the clinics. Our aim was to investigate whether clinical multispectral optoacoustic tomography (MSOT) could enable the label-free imaging of muscle perfusion and oxygenation under clinically relevant challenges: the arterial and venous occlusion. We employed a hybrid clinical MSOT/ultrasound system equipped with a hand-held scanning probe to visualize hemodynamic and oxygenation changes in skeletal muscle under arterial and venous occlusions. Four (N = 4) healthy volunteers were scanned over the forearm for both 3-minute occlusion challenges. MSOT-recorded pathophysiologically expected results during tests of disturbed blood flow with high resolution and without the need for contrast agents. During arterial occlusion, MSOT-extracted Hb-values showed an increase, while HbO(2)- and total blood volume (TBV)-values remained roughly steady, followed by a discrete increase during the hyperemic period after cuff deflation. During venous occlusion, results showed a clear increase in intramuscular HbO(2), Hb and TBV within the segmented muscle area. MSOT was found to be capable of label-free non-invasive imaging of muscle hemodynamics and oxygenation under arterial and venous occlusion. We introduce herein MSOT as a novel modality for the assessment of vascular disorders characterized by disturbed blood flow, such as acute limb ischemia and venous thrombosis.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Schlagwörter Ischemia ; Muscle Metabolism ; Peripheral Arterial Disease ; Photoacoustics ; Thrombosis; Endothelial Dysfunction; Brachial-artery; Microcirculation
ISSN (print) / ISBN 1864-063X
e-ISSN 1864-0648
Quellenangaben Band: 13, Heft: 6, Seiten: , Artikelnummer: e201960169 Supplement: ,
Verlag Wiley
Verlagsort Postfach 101161, 69451 Weinheim, Germany
Begutachtungsstatus Peer reviewed