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Bozhko, D. ; Karlas, A. ; Gorpas, D. ; Ntziachristos, V.

Optoacoustic sensing of hematocrit to improve the accuracy of hybrid fluorescence-ultrasound intravascular imaging.

J. Biophotonics 11:e201700255 (2018)

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	Open Access Green

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Hybrid intravascular fluorescence-ultrasound imaging is emerging for reading anatomical and biological information in vivo. By operating through blood, intravascular near-infrared fluorescence (NIRF) detection is affected by hemoglobin attenuation. Improved quantification has been demonstrated with methods that correct for the attenuation of the optical signal as it propagates through blood. These methods assume an attenuation coefficient for blood and measure the distance between detector and the vessel wall by observing the intravascular ultrasound images. Assumptions behind the attenuation employed in correction models may reduce the accuracy of these methods. Herein, we explore a novel approach to dynamically estimate optical absorption by using optoacoustic (photoacoustic) measurements. Adaptive correction is based on a trimodal intravascular catheter that integrates fluorescence, ultrasound and optoacoustic measurements. Using the novel catheter, we show how optoacoustic measurements can determine variations of blood absorption, leading to accurate quantification of the detected NIRF signals at different hematocrit values.

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Publication type Article: Journal article

Document type Scientific Article

Corresponding Author

Keywords Intravascular Ultrasound ; Multimodal Imaging ; Near-infrared Fluorescence ; Photoacoustic ; Quantitative Imaging; Atherosclerotic Plaque; Blood; Segmentation; Catheter; Images; Vivo; Ivus

ISSN (print) / ISBN 1864-063X

e-ISSN 1864-0648

Journal Journal of Biophotonics

Quellenangaben Volume: 11, Issue: 10, Article Number: e201700255

Publisher Wiley

Publishing Place Postfach 101161, 69451 Weinheim, Germany

Non-patent literature Publications

Reviewing status Peer reviewed

Institute(s) Institute of Biological and Medical Imaging (IBMI)