CONE-BEAM SPECT WITH A TILTED DETECTOR

被引：9

作者：

GRANGEAT, P ^{[1
]}

GUILLEMAUD, R ^{[1
]}

RIZO, P ^{[1
]}

SAUZE, R ^{[1
]}

DONNER, Q ^{[1
]}

GORIUS, JP ^{[1
]}

机构：

[1] INST NATL POLYTECH GRENOBLE, GRENOBLE, FRANCE

来源：

COMPUTERIZED MEDICAL IMAGING AND GRAPHICS | 1993年 / 17卷 / 4-5期

关键词：

IMAGE RECONSTRUCTION; 3-DIMENSIONAL RECONSTRUCTION; RADON TRANSFORM; CONE-BEAM; SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY; COLLIMATOR; TILTED DETECTOR; CEREBRAL BLOOD FLOW; BRAIN;

D O I：

10.1016/0895-6111(93)90018-I

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

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.

引用

页码：279 / 287

页数：9

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