用于单光子发射计算机断层扫描的张衰减校正方法的向量实现。

Vector implementation of Chang's attenuation correction method for single photon emission computed tomography.

作者信息

Sloboda R S

机构信息

Nuclear Medicine Department, Pasqua Hospital, Regina, Saskatchewan, Canada.

出版信息

Med Phys. 1987 Nov-Dec;14(6):1045-7. doi: 10.1118/1.595983.

DOI:10.1118/1.595983

PMID:3501063

Abstract

A vector version of Chang's attenuation correction method for single photon emission computed tomography accommodating arbitrary convex body contours is presented and its implementation on a general purpose array processor described. For a constant linear attenuation coefficient mu = 0.10 cm-1 and contour shapes similar to those encountered in clinical work, correction factors calculated with the vector algorithm are the same to within a few percent as those obtained using the original Chang method. Typical execution speed of the new algorithm is 0.01 s/correction factor for a 64 point contour.

摘要

本文提出了一种适用于单光子发射计算机断层扫描的张衰减校正方法的向量版本，该方法可适应任意凸体轮廓，并描述了其在通用阵列处理器上的实现。对于恒定的线性衰减系数μ = 0.10 cm-1以及与临床工作中遇到的轮廓形状相似的情况，使用向量算法计算的校正因子与使用原始张方法获得的校正因子在百分之几的范围内相同。对于64点轮廓，新算法的典型执行速度为0.01 s/校正因子。