A PROTOTYPE BAF2/TMAE LOW-PRESSURE MULTIWIRE PROPORTIONAL CHAMBER FOR PET

被引：5
作者：
SUCKLING, J [1 ]
OTT, RJ [1 ]
MARSDEN, PK [1 ]
BATEMAN, JE [1 ]
CONNOLLY, JF [1 ]
STEPHENSON, R [1 ]
机构：
[1] RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND
来源：
IEEE TRANSACTIONS ON NUCLEAR SCIENCE | 1991年 / 38卷 / 02期
关键词：
D O I：
10.1109/23.289377
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：
The RMH/ICR/RAL collaboration has constructed a prototype annihilation photon detector combining a 50x50x8mm3 BaF2 scintillator to a MWPC filled with a photoionising vapour (TMAE) at low pressure. The structure of the detector is currently undergoing optimisation but its present performance includes 8mm FWHM spatial resolution, 12ns timing resolution and 19% efficiency. It is intended that this technology, once proven, should form the basis for a clinical PET system. In order to cover the large active areas (600x400mm2) of a clinical system it will be necessary to use tiles of BaF2. Crystal boundary effects on image quality, studied using Monte-Carlo methods, show degraded spatial resolution by 40% axially and 27% radially/tangentially for a 6x4 array of 16mm thick crystals replacing a hypothetical large single crystal. Further studies to characterise the distribution of scattered events in the proposed camera are described.
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页码：703 / 708
页数：6
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