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Imaging blood flow inside highly scattering media using ultrasound modulated optical tomography
Author(s) -
Hussain Altaf,
Steenbergen Wiendelt,
Vellekoop Ivo M.
Publication year - 2018
Publication title -
journal of biophotonics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 66
eISSN - 1864-0648
pISSN - 1864-063X
DOI - 10.1002/jbio.201700013
Subject(s) - blood flow , optics , heterodyne (poetry) , optical tomography , scattering , ultrasound , anisotropy , materials science , light scattering , signal (programming language) , attenuation coefficient , tomography , physics , acoustics , medicine , computer science , radiology , programming language
We report the use of ultrasound modulated optical tomography (UOT) with heterodyne parallel detection to locally sense and image blood flow deep inside a highly scattering medium. We demonstrate that the UOT signal is sensitive to the speed of the blood flow in the ultrasound focus and present an analytical model that relates UOT signals to the optical properties (i. e. scattering coefficient, anisotropy, absorption, and flow speed) of the blood and the background medium. We found an excellent agreement between the experimental data and the analytical model. By varying the integration time of the camera in our setup, we were able to spatially resolve blood flow in a scattering medium with a lateral resolution of 1.5 mm.