Iterative concurrent reconstruction algorithms for emission computed tomography.

Iterative concurrent reconstruction algorithms for emission computed tomography.
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用于发射计算机断层扫描的迭代并发重建算法。

DOI:
10.1088/0031-9155/39/7/005
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发表时间:
1994
影响因子:
3.5
通讯作者:
Lang,TF
Lang,TF
中科院分区:
工程技术2区
文献类型:
--
作者:
Brown,JK;Hasegawa,BH;Lang,TF

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直接重建技术,例如基于过滤反投影的技术,通常用于发射计算机断层扫描(ECT),尽管有人认为迭代重建方法可以产生更好的临床图像。迭代重建算法的主要缺点是它们的计算负担,这也是它们缺乏临床接受性的一个重要原因。作者概述了一类新的用于ECT的“并发”迭代重建技术,其中重建过程被重新组织,使得很大一部分计算处理与ECT投影数据的获取同时进行。这些新算法使用典型SPECT扫描采集所需的10-30分钟来迭代处理可用的投影数据,显著减少了对采集后处理的要求。这些算法是在一个霍夫曼脑模型的SPECT投影数据上进行测试的,该模型在视图中用2×105个计数获得,每个视图都有投影。SPECT图像重建为*断层图像,从六个角度切面开始。以反映它们对典型采集协议的可用性的方式,将其他角度视图顺序地添加到重建过程中。结果表明,如果使用并发处理的T S,则完成数据采集后所需的重建处理时间至少可以减少1/3 T S。
Direct reconstruction techniques, such as those based on filtered backprojection, are typically used for emission computed tomography (ECT), even though it has been argued that iterative reconstruction methods may produce better clinical images. The major disadvantage of iterative reconstruction algorithms, and a significant reason for their lack of clinical acceptance, is their computational burden. The authors outline a new class of'concurrent'iterative reconstruction techniques for ECT in which the reconstruction process is reorganized such that a significant fraction of the computational processing occurs concurrently with the acquisition of ECT projection data. These new algorithms use the 10-30 min required for acquisition of a typical SPECT scan to iteratively process the available projection data, significantly reducing the requirements for post-acquisition processing. These algorithms are tested on SPECT projection data from a Hoffman brain phantom acquired with a 2* 10 5 counts in 64 views each having 64 projections. The SPECT images are reconstructed as 64* 64 tomograms, starting with six angular views. Other angular views are added to the reconstruction process sequentially, in a manner that reflects their availability for a typical acquisition protocol. The results suggest that if T s of concurrent processing are used, the reconstruction processing time required after completion of the data acquisition can be reduced by at least 1/3 T s.
使用迭代衰减校正算法和外部洪水源进行 SPECT 肝脏成像。
DOI: --
发表时间: 1986
影响因子: 9.3
作者:
J. Malko;R. V. Heertum;G. T. Gullberg;W. Kowalsky
通讯作者: W. Kowalsky
DOI: 10.1088/0031-9155/32/4/005
发表时间: 1987
影响因子: 3.5
作者:
FloydJr,CE;Jaszczak,RJ;Coleman,RE
通讯作者: Coleman,RE
DOI: --
发表时间: 1989-04
期刊: Journal of nuclear medicine : official publication, Society of Nuclear Medicine
影响因子: --
作者:
Benjamin M. W. Tsui;G. T. Gullberg;E. Edgerton;J. Ballard;J. Perry;W. H. McCartney;J. Berg
通讯作者: Benjamin M. W. Tsui;G. T. Gullberg;E. Edgerton;J. Ballard;J. Perry;W. H. McCartney;J. Berg
DOI: --
发表时间: 1992
影响因子: 9.3
作者:
T. Miller;J. Wallis
通讯作者: J. Wallis
用于发射断层扫描的矢量外推快速最大似然估计算法
DOI: --
发表时间: 1992
期刊: IEEE Trans. Medical Imaging
影响因子: --
作者:
N. Rajeevan;K. Rajgopal;G. Krishna
通讯作者: G. Krishna