带有倾斜探测器的锥束单光子发射计算机断层扫描

Cone-beam SPECT with a tilted detector.

作者信息

Grangeat P, Guillemaud R, Rizo P, Sauze R, Donner Q, Gorius J P

机构信息

LETI(CEA-Technologies Avancées), DSYS-CEN/G-85 X-F38041 Grenoble, France.

出版信息

Comput Med Imaging Graph. 1993 Jul-Oct;17(4-5):279-87. doi: 10.1016/0895-6111(93)90018-i.

DOI:10.1016/0895-6111(93)90018-i

PMID:8306299

Abstract

In this article we report on the TOMOCONIC project for cerebral SPECT using cone-beam collimators. First, we describe our experimental set-up. The cone-beam collimator improves both spatial resolution and sensitivity. We tilt the detector to center the focal point rotation plane on the region to reconstruct. Then, to minimize cone-beam artefacts, we use the Grangeat algorithm for image reconstruction. We describe here how it can be generated to this tilted acquisition geometry. Finally, we present our first experimental results and a comparison with parallel-beam SPECT. The improvement ratio on transverse spatial resolution is 1.5. We conclude with our first clinical images.

摘要

在本文中，我们报告了使用锥形束准直器进行脑单光子发射计算机断层扫描（SPECT）的TOMOCONIC项目。首先，我们描述了我们的实验装置。锥形束准直器提高了空间分辨率和灵敏度。我们倾斜探测器，使焦点旋转平面位于要重建的区域中心。然后，为了最小化锥形束伪影，我们使用格兰杰算法进行图像重建。我们在此描述如何针对这种倾斜采集几何结构生成该算法。最后，我们展示了我们的首批实验结果以及与平行束SPECT的比较。横向空间分辨率的提高率为1.5。我们以首批临床图像作为结论。