METHOD AND DEVICE FOR OBTAINING VASCULAR ASSESSMENT PARAMETERS IN RESTING STATE ON BASIS OF ANGIOGRAPHIC IMAGE

摘要

A method and device for obtaining vascular assessment parameters in resting state on the basis of an angiographic image. The method for obtaining vascular assessment parameters in resting state on the basis of an angiographic image comprises: obtaining the real-time pressure P _a at the entrance of the coronary artery in resting state to obtain a P _a-t pressure waveform in a time domain (S100); performing three-dimensional modeling on a blood vessel segment of interest in a two-dimensional angiographic image of the coronary artery under angiography to obtain a three-dimensional blood vessel mesh model (S200); obtaining the real-time blood flow velocity v in the three-dimensional blood vessel mesh model to obtain a v-t velocity waveform (S300); performing conversion to obtain a v _resting-t velocity waveform in resting state; obtaining a ΔP _resting-t pressure drop waveform from the entrance of the coronary artery to the distal end of coronary artery stenosis in the time domain by means of Fourier transform and inverse Fourier transform; and obtaining coronary artery vascular assessment parameters in resting state. The method and device implement measurement of coronary artery vascular assessment parameters during diastole, and then implement filtering of interference data by means of Fourier transform, thereby improving the accuracy of measurement of the coronary artery vascular assessment parameters.