A COMPARISON OF PET DETECTOR MODULES EMPLOYING RECTANGULAR AND ROUND PHOTOMULTIPLIER TUBES

被引：48

作者：

CHERRY, SR ^{[1
]}

TORNAI, MP ^{[1
]}

LEVIN, CS ^{[1
]}

SIEGEL, S ^{[1
]}

HOFFMAN, EJ ^{[1
]}

ANDREACO, MS ^{[1
]}

WILLIAMS, CW ^{[1
]}

机构：

[1] CTI PET SYST INC,KNOXVILLE,TN

来源：

IEEE TRANSACTIONS ON NUCLEAR SCIENCE | 1995年 / 42卷 / 04期

关键词：

D O I：

10.1109/23.467748

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：

We have compared the high resolution BGO detector blocks from the EXACT HR PET system which use two dual-cathode rectangular photomultiplier (PM) tubes with a new block design, the EXACT HR PLUS, which uses four round PM tubes. Despite the lower coupling area between photocathode and scintillator, the HR PLUS block compares favorably with the HR block. The energy resolution averages 20% for the HR PLUS block and 23% for the HR block, with efficiency variations of 17% in both blocks. Additional measurements were carried out on the HR PLUS block to characterize depth of interaction effects and cross-talk between elements. Coincidence line spread function measurements had a FWHM of 3.0 mm in the axial direction and 2.9 mm in the transaxial direction. In light of these results, limitations of the BGO block design are discussed and some solutions proposed.

引用

页码：1064 / 1068

页数：5

共 12 条

[1] A MULTICRYSTAL 2-DIMENSIONAL BGO DETECTOR SYSTEM FOR POSITRON EMISSION TOMOGRAPHY [J].