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首页> 外文期刊>IEEE Transactions on Medical Imaging >Maximum likelihood SPECT in clinical computation times using mesh-connected parallel computers
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Maximum likelihood SPECT in clinical computation times using mesh-connected parallel computers

机译:使用网格连接的并行计算机在临床计算时间中的最大似然SPECT

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摘要

Extending the work of A.W. McCarthy et al. (1988) and M.I. Miller and B. Roysam (1991), the authors demonstrate that a fully parallel implementation of the maximum-likelihood method for single-photon emission computed tomography (SPECT) can be accomplished in clinical time frames on massively parallel systolic array processors. The authors show that for SPECT imaging on 64*64 image grids, with 96 view angles, the single-instruction, multiple data (SIMD) distributed array processor containing 64/sup 2/ processors performs the expectation-maximization (EM) algorithm with Good's smoothing at a rate of 1 iteration/1.5 s. This promises for emission tomography fully Bayesian reconstructions including regularization in clinical computation times which are on the order of 1 min/slice. The most important result of the implementations is that the scaling rules for computation times are roughly linear in the number of processors.
机译:扩展A.W.的工作McCarthy等。 (1988)和M.I. Miller和B. Roysam(1991)的作者证明,在大规模并行收缩压阵列处理器的临床时间范围内,可以完全并行实施单光子发射计算机断层扫描(SPECT)的最大似然法。作者表明,对于在具有96个视角的64 * 64图像网格上进行SPECT成像,包含64 / sup 2 /处理器的单指令多数据(SIMD)分布式阵列处理器执行具有Good's的期望最大化(EM)算法。以1次迭代/1.5秒的速率进行平滑。这有望实现放射线断层摄影的完全贝叶斯重建,包括临床计算时间的正则化,约为每分钟1分钟。这些实现的最重要结果是,计算时间的缩放规则在处理器数量上大致呈线性关系。

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