A simple theorem relating noise anti patient dose in computed tomography

被引：32

作者：

Harpen, MD ^{[1
]}

机构：

[1] Univ S Alabama, Dept Radiol, Mobile, AL 36617 USA

来源：

MEDICAL PHYSICS | 1999年 / 26卷 / 11期

关键词：

CT; noise; x-ray filters;

D O I：

10.1118/1.598778

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 [临床医学]; 100207 [影像医学与核医学]; 1009 [特种医学];

摘要：

Presented is a simple model describing the dependence of image noise in computed tomography on the x-ray beam profile. The model is used to derive the x-ray profile which minimizes total image noise at constant integral patient dose. The profile may be produced with a bow-tie-type beam shaping filter. Results of the analysis are validated using a computer simulation of computed tomography (CT) acquisition and reconstruction. (C) 1999 American Association of Physicists in Medicine. [S0094-2405(99)01211-0].

引用

页码：2231 / 2234

页数：4