从血管造影照片测定冠状动脉直径和造影剂浓度——可能性与局限性

Determination of coronary artery diameter and contrast medium concentration from angiograms - possibilities and limitations.

作者信息

van Wijk van Brievingh R P, Heethaar R M, van der Werf T

出版信息

J Biomed Eng. 1981 Jan;3(1):57-64. doi: 10.1016/0141-5425(81)90107-2.

Abstract

The quantification of coronary arterial stenosis is a great clinical importance. The coronarograms obtained with the usual X-ray systems are severely distorted. The principal effects, underlying this distortion are the focal spot dimensions, blurring due to object movements and noise due to individual X-ray photons. Some general assessment, as well as a simplified procedure are given. Under the assumptions of a cylindrical artery and a Gaussian curve for its density graph, a relation can be derived to calculate the artery diameter. Application to test objects show that this is a practicable method.

摘要

冠状动脉狭窄的量化具有重大临床意义。使用常规X射线系统获得的冠状动脉造影图像严重失真。造成这种失真的主要影响因素是焦点尺寸、物体移动导致的模糊以及单个X射线光子产生的噪声。文中给出了一些总体评估以及一种简化程序。在假定动脉为圆柱形且其密度图为高斯曲线的情况下，可以推导出一个用于计算动脉直径的关系式。对测试对象的应用表明这是一种可行的方法。