Abstract:Intravascular photoacoustic (IVPA) imaging is a newly developed interventional imaging modality to detect and distinguish atherosclerotic plaques based on the differences between the optical absorption characteristics of different plaque tissues. It combines the contrast of optical absorption with the spatial resolution of ultrasound for deep imaging to obtain comprehensive information of morphology and component of atherosclerotic plaques. In this paper, the progress of IVPA imaging system as well as its applications in spectroscopy imaging, thermal imaging, molecular imaging and coronary stent imaging was reviewed. The current development of integrated IVPA/IVUS imaging catheter is then summarized. The existing problems and future directions in the design and implement IVPA system were also discussed.
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