THEORETICAL RESOLUTION OF COMPUTED TOMOGRAPHY SYSTEMS

被引：39

作者：

GLOVER, GH

EISNER, RL

机构：

[1] Applied Science and Diagnostic Laboratory, General Electric Medical Systems, Milwaukee, WI, 53201

来源：

JOURNAL OF COMPUTER ASSISTED TOMOGRAPHY | 1979年 / 3卷 / 01期

关键词：

Computed tomography; Modulation transfer function; Point response function; Resolution;

D O I：

10.1097/00004728-197902000-00014

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

A simple analytic model is presented which is used to calculate the impulse response of a computed tomography system for parametric variations of the geometry. The model is useful for fan beam as well as parallel beam geometries. Results show that wide-aperture detector systems have intrinsic resolution limitations that are not mitigated by oversampling. Furthermore, the optimum focal spot size of the X-ray source is found to be dependent on the detector geometry. © 1979 Raven Press, New York.

引用

页码：85 / 91

页数：7

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