A DEPTH-ENCODED PET DETECTOR

被引：38

作者：

BARTZAKOS, P ^{[1
]}

THOMPSON, CJ ^{[1
]}

机构：

[1] MCGILL UNIV,MED PHYS UNIT,MONTREAL H3A 2B4,QUEBEC,CANADA

来源：

IEEE TRANSACTIONS ON NUCLEAR SCIENCE | 1991年 / 38卷 / 02期

关键词：

D O I：

10.1109/23.289382

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：

Radial blurring in high-resolution positron emission tomography (PET) can be reduced by measuring the PET photon's depth of interaction within a detector crystal. Simulations show that dividing the crystal into two equiprobable regions of interaction almost eliminates this blurring. This has been done using a black band placed around a 3 cm BGO crystal, 1 cm from the front. A PMT collects light from the rear of the crystal for energy and timing measurement. Another PMT collects light through a light guide from the top-front of the crystal to find the depth of interaction. Gamma rays interacting in the front of the crystal produce a strong, signal in the depth-sensing PMT, while interactions behind the band produce weaker (< 10%) signal. The intensity of the light recorded by the energy PMT is almost constant (within +/- 3%) for interactions at any depth in the crystal.

引用

页码：732 / 738

页数：7

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