Randoms estimation for list-mode reconstruction for the ECAT HRRT

被引：0

作者：

Barker, WC ^{[1
]}

Liow, JS ^{[1
]}

Rodriguez, M ^{[1
]}

Thada, S ^{[1
]}

Iano-Fletcher, AR ^{[1
]}

Lenox, M ^{[1
]}

Michel, C ^{[1
]}

Johnson, CA ^{[1
]}

Carson, RE ^{[1
]}

机构：

[1] NIH, PET Dept, Ctr Clin, Bethesda, MD 20892 USA

来源：

2004 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-7 | 2004年

关键词：

D O I：

暂无

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

A randoms correction method has been implemented for list-mode image reconstruction of data from the ECAT HRRT (High Resolution Research Tomograph). The random coincidence rate for each list-mode event is estimated from the relevant block singles rates, the estimated coincidence timing window (7), and the fractional efficiency of the crystal within the block. From a decaying phantom study, tau ranged from 2.80-2.97 nsec, consistent with the expected value of 3 nsec, having only a slight variation with count rate. Because the fractional crystal efficiencies were also found to be count rate dependent with higher LYSO/LSO relative efficiency at higher count rates, we have determined that a count rate dependent correction is necessary. No photon energy/object size dependence was found for the efficiencies.

引用

页码：3510 / 3513

页数：4

共 5 条

[1] Carson RE, 2003, IEEE NUCL SCI S MED
[2] Casey M. E., 1995, Proceedings of the 1995 International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, P67
[3] Evans R, 1955, ATOMIC NUCL, P791
[4] Software architecture of the MOLAR-HRRT reconstruction engine
Johnson, CA
Thada, S
Rodriguez, M
Zhao, YS
Iano-Fletcher, AR
Liow, JS
Barker, WC
Martino, RL
Carson, RE
[J]. 2004 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-7, 2004, : 3956 - 3960
[5] The ECAT HRRT: Performance and first clinical application of the new high resolution research tomograph
Wienhard, K
Schmand, M
Casey, ME
Baker, K
Bao, J
Eriksson, L
Jones, WF
Knoess, C
Lenox, M
Lercher, M
Luk, P
Michel, C
Reed, JH
Richerzhagen, N
Treffert, J
Vollmar, S
Young, JW
Heiss, WD
Nutt, R
[J]. IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 2002, 49 (01) : 104 - 110

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