Chinese Optics Letters, 2020, 18 (10): 101702, Published Online: Sep. 3, 2020
Tomography-assisted Doppler photoacoustic microscopy: proof of concept Download: 815次
Abstract
The previous methods to measure flow speed by photoacoustic microscopy solely focused on either the transverse or the axial flow component, which did not reflect absolute flow speed. Here, we present absolute flow speed maps by combining Doppler bandwidth broadening with volumetric photoacoustic microscopy. Photoacoustic Doppler bandwidth broadening and photoacoustic tomographic images were applied to measure the transverse flow component and the Doppler angle, respectively. Phantom experiments quantitatively demonstrated that ranges of 55° to 90° Doppler angle and 0.5 to 10 mm/s flow speed can be measured. This tomography-assisted method provides the foundation for further measurement in vivo.
Xinkun Wang, Kedi Xiong, Xin Jin, Sihua Yang. Tomography-assisted Doppler photoacoustic microscopy: proof of concept[J]. Chinese Optics Letters, 2020, 18(10): 101702.