STUDY OF THE SPATIAL-RESOLUTION IN GAMMA-DETECTORS USING PHOTOSENSITIVE WIRE CHAMBERS IN VIEW OF THEIR USE AS HIGH-RESOLUTION PET SCANNERS

被引：5

作者：

BRUYNDONCKX, P

SHUPING, Z

TAVERNIER, S

机构：

[1] Interuniversity Institute for High Energies, VUB-ULB, 1050 Brussels

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1992年 / 323卷 / 1-2期

关键词：

D O I：

10.1016/0168-9002(92)90268-9

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The spatial resolution in gamma detectors using BaF2 scintillators and photosensitive wire chambers was studied for 511 keV gamma rays with different crystal geometries. When a matrix of small crystals was used, the spatial resolution was dominated by the crystal dimensions. With crystals measuring 3 x 3 x 20 and 2 x 2 x 15 mm3 and with 0.3 mm dead space between them, we obtained a resolution FWHM of 3.7 and 3.0 mm, respectively. With one large crystal 20 mm thick a resolution of 7.9 mm FWHM was obtained. We used a Monte Carlo study to evaluate the performances of a high resolution PET scanner for small animals based on this principle. Such a device is presently under construction.

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页码：54 / 59

页数：6

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