Analytical reconstruction for helical cone-beam SPECT with non-uniform attenuation correction

被引：0
|
作者：
Huang, Qiu [1 ]
Zeng, Gengsheng L. [1 ]
Gullberg, Grant T. [1 ]
机构：
[1] Univ Utah, UCAIR, Dept Radiol, Salt Lake City, UT 84108 USA
来源：
2005 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-5 | 2005年
关键词：
D O I：
暂无
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
This paper concerns image reconstruction for helical cone-beam (CB) single photon emission computed tomography (SPECT) with compensation of non-uniform attenuation. We present a filtering-backprojection-filtering algorithm of the FDK type by extending the FBP algorithms for attenuated fan-beam projections to the three-dimensional (3D) cone-beam projections. Each transaxial slice can be reconstructed from attenuated projection data acquired along a specific 2 pi segment of the helix. CB artifacts are less for smaller pitch of the heical trajectory. The algorithm is validated by numerical results for a simulated Shepp-Logan-like phantom and the Defrise phantom.
引用
收藏
页码：1856 / 1859
页数：4
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