An Iterative Image Space Reconstruction Algorthm Suitable for Volume ECT
An Iterative Image Space Reconstruction Algorthm Suitable for Volume ECT
复制标题
一种适用于体积ECT的迭代图像空间重建算法
DOI：
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发表时间：
1986
影响因子：
10.6
通讯作者：
G. Muehllehner
中科院分区：
文献类型：
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作者：
M. Daube;G. Muehllehner
用于正电子发射计算机断层摄影的扫描器的设计的趋势传统上是将横向空间分辨率提高到几毫米，同时保持相对粗糙的轴向分辨率（1- 2cm）。几个扫描仪正在建立与轴向以及横向方向的精细采样，导致真正的体积成像的可能性。这些扫描仪中可能的符合对的数量相当大。通常的图像重建方法在不进行近似的情况下不能处理这些数据。通过在重建之前对符合数据进行反向投影来减小这种大的、稀疏填充的阵列的尺寸在计算上是最有效的。虽然分析重建技术存在的反投影数据，迭代算法可能是必要的点扩散函数的空间变化的情况下。最大似然算法的修改，提出了重建这些反投影数据。该方法，迭代图像空间重建算法（ISRA），是能够重建数据从扫描仪与空间变化的点扩散函数在更短的时间比其他提出的算法。结果是单层数据，模拟和实际，从PENN-PET扫描仪。
The trend in the design of scanners for positron emission computed tomography has traditionally been to improve the transverse spatial resolution to several millimeters while maintaining relatively coarse axial resolution (1-2 cm). Several scanners are being built with fine sampling in the axial as well as transverse directions, leading to the possibility of the true volume imaging. The number of possible coincidence pairs in these scanners is quite large. The usual methods of image reconstruction cannot handle these data without making approximations. It is computationally most efficient to reduce the size of this large, sparsely populated array by back-projecting the coincidence data prior to reconstruction. While analytic reconstruction techniques exist for back-projected data, an iterative algorithm may be necessary for those cases where the point spread function is spatially variant. A modification of the maximum likelihood algorithm is proposed to reconstruct these back-projected data. The method, the iterative image space reconstruction algorithm (ISRA), is able to reconstruct data from a scanner with a spatially variant point spread function in less time than other proposed algorithms. Results are presented for single-slice data, simulated and actual, from the PENN-PET scanner.
用于脑成像的正电子断层扫描仪的性能评估。
DOI：
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发表时间：
1983
期刊：
Journal of nuclear medicine : official publication, Society of Nuclear Medicine
影响因子：
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作者：
Hoffman,EJ;Phelps,ME;Huang,SC
通讯作者：
Huang,SC
SPRINT（用于脑成像的单光子环断层扫描）的性能评估。
DOI：
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发表时间：
1984
期刊：
Journal of nuclear medicine : official publication, Society of Nuclear Medicine
影响因子：
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作者：
Rogers,WL;Clinthorne,NH;Stamos,J;Koral,KF;Mayans,R;Knoll,GF;Juni,J;KeyesJr,JW;Harkness,BA
通讯作者：
Harkness,BA