The hemodynamics and oxygen saturation status of vascular are very important biomarkers for disease, such as brain glioma tumor and ischemia-reperfusion ulcer. Therefore, a high spatial resolution imaging tool for vascular imaging is demanded. Conventional optical imaging modalities, including confocal microscopy and two-photon microscopy, require external contrast agent to image blood vessels and are not sensitive to oxygen saturation. The development of photoacoustic microscopy provides a contrast-free, high-spatial resolution and functional vascular imaging tool. It’s gaining more and more popularity in biomedical research. In this paper, we introduce a dual-wavelength opticalresolution photoacoustic microscopy (OR-PAM) system for functional imaging of vasculature. This system has demonstrated its application in brain glioma tumor imaging, as well as skin ischemia-reperfusion imaging.
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