The geometric response function for convergent slit-slat collimators

被引:14
作者
Li, Yusheng [1 ]
Oldendick, James [1 ]
Ordonez, Caesar E. [1 ]
Chang, Wei [1 ]
机构
[1] Rush Univ, Med Ctr, Dept Diagnost Radiol, Chicago, IL 60612 USA
关键词
BEAM COLLIMATORS; DETECTOR; SPECT; SENSITIVITY; RESOLUTION;
D O I
10.1088/0031-9155/54/6/006
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
We have derived an analytic geometric transfer function (GTF) for a convergent slit-slat collimator that treats the parallel slit-slat collimator as a special case. The effective point spread function (EPSF) is then derived from the GTF through the Fourier transform. The results of these derivations give an accurate description of the complete geometric response for a slit-slat collimator that includes the effects of the shape and orientation of the slit and slats. We have also derived exact and approximate sensitivity formulae and spatial resolution formulae using the EPSF.
引用
收藏
页码:1469 / 1482
页数:14
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