Influence of sensor arrangements and scintillator crystal properties on the 3D precision of monolithic scintillation detectors in PET

被引：0
|
作者：
Ojala, Peter [1 ]
Bousselham, Abdelkader [1 ]
Eriksson, Lars [1 ]
Brahme, Anders [1 ]
Bohm, Christian [1 ]
机构：
[1] Univ Stockholm, Dept Med Radiat Phys, S-10691 Stockholm, Sweden
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 reports the characterization and comparison of different sensor configurations for monolithic scintillation crystals via the calculation of a figure of a merit based on statistical (Fischer) information. The optimal precision of maximum likelihood determinations of interaction positions, i.e. where annihilation photons are absorbed in a monolithic (LSO) crystal, is approximated throughout a crystal block via Fischer information (related to the width of the maximum likelihood distribution) evaluated at a grid of points. Realistic positions and thus realistic. distributions of points of interaction are estimated by applying a maximum likelihood algorim to Monte Carlo data. The algorithm was based on pattern recognition using a Monte Carlo generated lookup table and the least square method. The precision of this method is compared with the optimal (Cramer-Rao) limit for selected points.
引用
收藏
页码：3018 / 3021
页数：4
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