Microcirculation may be characterized by the vascular pressure as it is influenced by pressure-driven perfusion. Crosssections of blood vessels can be visualized by photoacoustic imaging and compressing on vessels causes deformation. The photoacoustic signals of blood, when compressed to the point of vessel collapse, may or may not vanish depending on the buckling process it undergoes. We form relative pressure images of microvessels by tracking vessel collapse as a function of externally applied pressure using photoacoustic imaging.
Min Choi and Roger Zemp, "Relative microvascular pressure sensing," Proc. SPIE 9708, Photons Plus Ultrasound: Imaging and Sensing 2016, 97081D (Presented at SPIE BiOS: February 15, 2016; Published: 18 March 2016); https://doi.org/10.1117/12.2213607.
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