NONUNIFORM ATTENUATION CORRECTION USING SIMULTANEOUS TRANSMISSION AND EMISSION CONVERGING TOMOGRAPHY

被引：151

作者：

TUNG, CH ^{[1
]}

GULLBERG, GT ^{[1
]}

ZENG, GL ^{[1
]}

CHRISTIAN, PE ^{[1
]}

DATZ, FL ^{[1
]}

MORGAN, HT ^{[1
]}

机构：

[1] PICKER INT,OHIO IMAGING,BEDFORD HTS,OH

来源：

IEEE TRANSACTIONS ON NUCLEAR SCIENCE | 1992年 / 39卷 / 04期

基金：

美国国家卫生研究院;

关键词：

D O I：

10.1109/23.159773

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：

Photon attenuation in cardiac single photon emission computed tomography (SPECT) is a major factor contributing to the quantitative inaccuracy and the decrease in specificity of lesion detection. A measured map of the attenuation distribution is used in combination with iterative reconstruction algorithms to accurately compensate for the variable attenuation in the chest. The transmission and emission data are acquired simultaneously using a multi-detector, fan-beam collimated SPECT system with a transmission line source (Tc-99m) precisely aligned at the focal line opposite one of the detectors and of a different energy than the emission source (Tl-201). The contamination of transmission data by the high energy photopeaks of Tl-201 is removed based upon measurements from emission-only acquisition detectors. An algorithm was derived to eliminate scatter of Tc-99m transmission photons (140 keV) into the lower energy Tl-201 window (73 keV) of all three detectors. The quantitative accuracy of cardiac SPECT is significantly improved using simultaneously acquired transmission and emission data which are obtained in a clinically acceptable patient scanning time.

引用

页码：1134 / 1143

页数：10

共 13 条

[1]

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