Randoms and TOF gain revisited

被引：29

作者：

Eriksson, Lars ^{[1
,2
,3
,4
]}

Conti, Maurizio ^{[1
]}

机构：

[1] Siemens Healthcare Mol Imaging, Knoxville, TN USA

[2] Univ Stockholm, Dept Phys, S-10691 Stockholm, Sweden

[3] Karolinska Inst, Dept Clin Neurosci, Stockholm, Sweden

[4] Univ Tennessee, Dept Mat Sci Engn, Scintillat Mat Res Ctr, Knoxville, TN USA

来源：

PHYSICS IN MEDICINE AND BIOLOGY | 2015年 / 60卷 / 04期

关键词：

PET; TOF PET; TOF gain; randoms; time resolution; TIME-OF-FLIGHT; PET; RECONSTRUCTION;

D O I：

10.1088/0031-9155/60/4/1613

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

Time-of-flight (TOF) positron emission tomography (PET) typically reduces the variance in the images by a factor that is proportional to the size of the object to be scanned, and inversely proportional to the time resolution of the PET scanner. Attempts to better characterize this relationship and understand its limits have been published, showing that such gain also increases with random fraction. In this paper, new experimental and simulated data are analyzed and old results are incorporated in the study. The proportionality of TOF gain with time resolution is confirmed, the proportionality constant is measured, the effect of the randoms is validated, and the limit of the model for small objects is investigated.

引用

页码：1613 / 1623

页数：11

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