A photoacoustic contrast mechanism is presented based on the photoacoustic fluctuations induced by microbubbles flowing inside a micro-vessel filled with a continuous absorber. It is demonstrated that the standard deviation of a homogeneous absorber mixed with microbubbles increases non-linearly as the microbubble concentration and microbubble size is increased. This effect is then utilized to perform photoacoustic fluctuation imaging with increased visibility and contrast of a blood flow phantom.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8725790 | PMC |
| http://dx.doi.org/10.1121/10.0009129 | DOI Listing |
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