Uniform attenuation correction using the frequency-distance principle.
Uniform attenuation correction using the frequency-distance principle.
复制标题
利用频率距离原理进行均匀衰减校正。
DOI：
10.1118/1.2794171
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发表时间：
2007
期刊：
影响因子：
3.8
通讯作者：
Zeng,GengshengL
中科院分区：
文献类型：
--
作者：
Zeng,GengshengL
频率-距离原理（FDP）是一种众所周知的关系，它将对象和探测器之间的距离与投影正弦图的二维傅立叶变换中的斜率相关联。该关系先前已经在文献中应用于SPECT（单光子发射计算机断层摄影）中的距离相关准直器模糊的补偿。本文尝试用FDP校正SPECT中的均匀衰减。计算机模拟表明，这种技术的工作以及由点源组成的对象，但不适合分布式对象。
The frequency‐distance principle (FDP) is a well‐known relationship that relates the distance between the object and the detector to the slope in the two‐dimensional Fourier transform of the projection sinogram. This relationship has been previously applied to compensation of the distance dependent collimator blurring in SPECT (single photon emission computed tomography) in the literature. This paper makes an attempt to use the FDP to correct for uniform attenuation in SPECT. Computer simulations reveal that this technique works well for objects consisting of point sources but does not work well for distributed objects.