X射线摄影中总不清晰度的一种新公式。

A new formulation of total unsharpness in radiography.

作者信息

Harms A A, Zeilinger A

出版信息

Phys Med Biol. 1977 Jan;22(1):70-80. doi: 10.1088/0031-9155/22/1/009.

Abstract

A new formulation of total unsharpness in radiography based on line spread and edge spread function analysis is established and investigated. The unsharpness contributions due to (1) screen conversion, (2) object motion and (3) geometric effects are incorporated into a general integral formulation. Comparisons with experiments are undertaken and the ambiguity, as well as limitation, of a widely used empirical unsharpness formula is clarified.

摘要

基于线扩展函数和边缘扩展函数分析，建立并研究了一种用于射线照相中总不清晰度的新公式。将由于（1）增感屏转换、（2）物体运动和（3）几何效应导致的不清晰度贡献纳入一个通用的积分公式中。与实验进行了比较，并阐明了一个广泛使用的经验不清晰度公式的模糊性和局限性。