1. Defocus and contrast agent absorption compensation method in intravascular optical coherence tomography imaging

    Defocus and contrast agent absorption compensation method in intravascular optical coherence tomography imaging

    Intravascular optical coherence tomography (IVOCT) has been widely used in clinical coronary artery intervention field. Owing to defocus and contrast agent absorption effects, the intensity fluctuation caused by imaging catheter locating at an eccentric position significantly influence the quality of IVOCT imaging and even plaque type identification. In this paper, we present a novel method to compensate intensity fluctuation caused by defocus and contrast agent absorption in IVOCT imaging. We construct a principle model of IVOCT intensity signal based on defocus function and contrast agent absorption. By measuring the parameters of defocus function and contrast agent absorption, we compensate intensity ...

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