The geometric response function for convergent slit-slat collimators.
The geometric response function for convergent slit-slat collimators.
复制标题
会聚狭缝板条准直器的几何响应函数。
DOI：
10.1088/0031-9155/54/6/006
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发表时间：
2009
影响因子：
3.5
通讯作者：
Chang,Wei
中科院分区：
文献类型：
--
作者：
Li,Yusheng;Oldendick,James;Ordonez,CaesarE;Chang,Wei
本文推导了一种以平行缝缝准直器为特例的收敛缝缝准直器的解析几何传递函数。然后通过傅里叶变换从GTF中得到有效的点扩散函数（EPSF）。这些推导的结果准确地描述了狭缝和狭缝准直器的完整几何响应，包括狭缝和狭缝的形状和方向的影响。我们还利用EPSF导出了精确和近似的灵敏度公式和空间分辨率公式。
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.