Cone beam collimation for single photon emission computed tomography: analysis, simulation, and image reconstruction using filtered backprojection.
Cone beam collimation for single photon emission computed tomography: analysis, simulation, and image reconstruction using filtered backprojection.
复制标题
单光子发射计算机断层扫描的锥束准直：使用滤波反投影进行分析、模拟和图像重建。
DOI：
10.1118/1.595854
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发表时间：
1986
期刊：
影响因子：
3.8
通讯作者：
Coleman,RE
中科院分区：
文献类型：
--
作者：
Jaszczak,RJ;FloydJr,CE;Manglos,SH;Greer,KL;Coleman,RE
本文提出了一种分析两个锥形束配置（具有40和60厘米的焦距）的单光子发射计算机断层扫描（SPECT）投影数据的采集。三维滤波反投影算法用于重建使用蒙特卡罗模拟获得的锥形束投影数据的SPECT图像。数学分析得出锥形束配置的轴上点源灵敏度（计算距离准直器表面15 cm）是具有类似几何分辨率的平行孔和扇形束几何结构灵敏度的1.4-3倍。锥形束准直为使用大视场闪烁相机的SPECT设备提供了提高灵敏度的潜力。
This paper presents an analysis of two cone beam configurations (having focal lengths of 40 and 60 cm) for the acquisition of single photon emission computed tomography (SPECT) projection data. A three‐dimensional filtered backprojection algorithm is used to reconstruct SPECT images of cone beam projection data obtained using Monte Carlo simulations. The mathematical analysis resulted in on‐axis point source sensitivities (calculated for a distance of 15 cm from the collimator surface) for cone beam configurations that were 1.4–3 times the sensitivities of parallel‐hole and fan beam geometries having similar geometric resolutions. Cone beam collimation offers the potential for improved sensitivity for SPECT devices using large‐field‐of‐view scintillation cameras.