SUZHOU RAINMED MEDICAL TECHNOLOGY CO., LTD.;苏州润迈德医疗科技有限公司
发明人:
HUO, Yunfei,霍云飞,LIU, Guangzhi,刘广志,WU, Xingyun,吴星云
申请号：
CNCN2019/071206
公开号：
WO2020/098140A1
申请日:
2019.01.10
申请国别(地区):
CN
年份:
2020
代理人:
摘要：
Disclosed is a method for calculating a instantaneous wave-free ratio and a diastolic pressure ratio during angiography on the basis of angiography images, comprising: measuring the pressure P a of the coronary orifice during diastole (S01)； obtaining the two-dimensional vascular diameter and length of the blood vessel via angiography images, generating a three-dimensional blood vessel mesh model from the two angiography images, and obtaining the three-dimensional vascular diameter and length of the blood vessel (S02)； measuring the time that the blood containing a contrast medium goes from a start point to an end point of a specified length of blood vessel during diastole, and calculating a blood flow velocity V 1 according to the time and the three-dimensional length of the blood vessel (S03)； with V 1 as the coronary orifice flow velocity, calculating a pressure drop ΔP from the coronary orifice to the distal end of a coronary stenosis； with the average intra-coronary pressure at the distal end of the stenosis P d = P a-ΔP, calculating the instantaneous wave-free ratio and the diastolic pressure ratio during angiography (S04). Without the use of vasodilators, the instantaneous wave-free ratio and the diastolic pressure ratio during angiography can be obtained via conventional angiography images.L'invention porte sur un procédé de calcul d'un rapport sans onde instantané et d'un rapport de pression diastolique pendant une angiographie sur la base d'images d'angiographie, consistant : à mesurer la pression P a de l'orifice coronaire pendant la diastole (S01) ； à obtenir un diamètre vasculaire bidimensionnel et une longueur du vaisseau sanguin par l'intermédiaire d'images d'angiographie, à générer un modèle de maillage de vaisseau sanguin tridimensionnel à partir des deux images d'angiographie, et à obtenir un diamètre vasculaire tridimensionnel et la longueur du vaisseau sanguin (S02) ； à mesurer le temps pendant lequel le sang contenant un moyen de contraste passe
