A comparison of the imaging performance of different PSPMTs for PET applications
A comparison of the imaging performance of different PSPMTs for PET applications
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PET 应用中不同 PSPMT 的成像性能比较
DOI：
10.1016/j.nima.2003.11.033
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发表时间：
2004
影响因子：
1.4
通讯作者：
A. Guerra
中科院分区：
文献类型：
--
作者：
D. Herbert;N. Belcari;M. Camarda;A. Guerra
研究了三种不同类型的位置灵敏光电倍增管，并对它们与闪烁体阵列耦合时的成像性能进行了比较。这种位置敏感管常常构成符合探测正电子湮没产生的511keV伽马射线的基础。这里研究的三个管子是R2486、R8520和H8500，它们都来自滨松，跨越了多年的技术开发。R2486是一种圆管，其光电阴极直径为50 mm，主体直径为76 mm。R8520是一款紧凑的25.7×25.7平方毫米探测器，有源面积为22×22毫米。H8500又称平板管，是一种面积为52×52 mm~2的大面积正方形探测器，有效面积为49×49 mm~2。采用40×40 mm~2YAP：Ce矩阵，由2×2×25 mm~3个像素组成，用来评价各管在511keV下的成像性能。这种成像性能在这里根据图像像素半高宽和峰谷比来表征。在介绍了这些结果之后，讨论了每种管子的相对优点以及它们在未来PET应用中的适用性。
Three different types of Position Sensitive PhotoMultiplier tube have been studied and compared in terms of their imaging performance when coupled to scintillator arrays. Such position sensitive tubes often form the basis for the coincident detection of the 511keV gamma-rays produced as a result of positron annihilation in PET. The three tubes studied here are the R2486, the R8520 and the H8500 all from Hamamatsu and span a number of years of technological development. The R2486 is a circular tube that has a photocathode of diameter 50mm and a body diameter of 76mm. The R8520 is a compact 25.7×25.7mm2square detector with a 22×22mm2active area. The H8500, also called the flat panel tube, is a large area square detector of 52×52mm2with an active area of 49×49mm2. A 40×40mm2YAP:Ce matrix composed of 2×2×25mm3pixels is used in order to assess the imaging performance of each tube at 511keV. This imaging performance is characterised here in terms of the image pixel FWHM and the peak-to-valley ratio. After the presentation of these results a discussion is given of the relative merits of each tube and its suitability for future PET applications.