A System Calibration and Fast Iterative Reconstruction Method for Next-Generation SPECT Imagers

被引：0

作者：

Miller, Brian W. ^{[1
]}

Van Holen, Roel ^{[2
]}

Barrett, Harrison H. ^{[1
]}

Furenlid, Lars R. ^{[1
]}

机构：

[1] Univ Arizona, Ctr Gamma Ray Imaging, Tucson, AZ 85724 USA

[2] Univ Ghent, MEDISIP, Dept Elect & Informat Syst, B-9000 Ghent, Belgium

来源：

2011 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE (NSS/MIC) | 2011年

基金：

美国国家卫生研究院;

关键词：

Single-photon emission computed tomography (SPECT); calibration; system matrix; image reconstruction; high-performance computing; graphics processing units; OSEM;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Recently, high-resolution gamma cameras have been developed with detectors containing > 105(_)10(6) elements. SPECT imagers based on these detectors usually also have a large number of voxel bins and therefore face memory storage issues for the system matrix when performing fast tomographic reconstructions using iterative algorithms. To address these issues, we have developed a method that parameterizes the detector response to a point source and generates the system matrix on the fly during MLEM or OS EM on graphics hardware. T he calibration method, interpolation of coefficient data, and reconstruction results are presented in the context of a recently commissioned small-animal SPECT imager, called FastSPECT III.

引用

页码：3548 / 3553

页数：6

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