Effect of randoms on signal-to-noise ratio in TOF PET

被引：69

作者：

Conti, Maurizio ^{[1
]}

机构：

[1] Siemens Med Solut, Mol Imaging, Knoxville, TN 37932 USA

来源：

IEEE TRANSACTIONS ON NUCLEAR SCIENCE | 2006年 / 53卷 / 03期

关键词：

PET; randoms; signal-to-noise ratio; time-of-flight; TOF;

D O I：

10.1109/TNS.2006.875066

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 [电气工程]; 0809 [电子科学与技术];

摘要：

Time-of-flight (TOF) positron emission tomography (PET) has the potential to improve signal-to-noise ratio (SNR). In the literature, this improvement has been estimated as proportional to the square root of D/Delta x, where D is the radial dimension of the object to be imaged, and Delta x is the spatial uncertainty associated with the time resolution of the scanner. This estimate does not include the effect of the randoms. In this paper we discuss the role of random coincidence in TOF PET; in particular, the improvement in SNR due to random reduction in TOF PET. We introduce and discuss a simple model for this improvement, modify the traditional estimate for SNR gain, and compare it to experimental data from a Siemens Hi-Rez PET scanner with TOF capability.

引用

页码：1188 / 1193

页数：6

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