Three-dimensional array of scintillation crystals with proper reflector arrangement for a depth of interaction detector
Three-dimensional array of scintillation crystals with proper reflector arrangement for a depth of interaction detector
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用于相互作用深度探测器的具有适当反射器布置的闪烁晶体三维阵列
DOI：
10.1109/nssmic.2003.1352377
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
T. Tsuda
中科院分区：
文献类型：
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作者：
N. Orita;H. Murayama;H. Kawai;N. Inadama;T. Tsuda
提出了一种16/spl times/16/spl times/4多晶探测器模块，用于获取下一代正电子发射断层扫描仪的相互作用深度（DOI）信息，以实现高分辨率和高灵敏度。闪烁晶体阵列与具有大开口面积的256 ch平板位置敏感光电倍增管（256 ch FP-PMT）耦合。一个单元由2/spl倍/2/spl倍/4个晶体元件组成。这些单元在256通道FP-PMT上以8/spl × 8阵列排列作为DOI检测器模块。用均匀γ射线辐照评价了晶体鉴别性能。根据FP-PMT的多阳极输出的相对比率，将测量的闪烁事件映射到二维定位直方图上。然而，对应于一个单元的晶体元素的峰在所得到的定位直方图中形成集落，并且在相邻集落之间存在大的空间。为了减少这种无用的空间，我们提出了一种新的反射镜的DOI探测器模块的安排方法。初步实验表明，在三维晶体阵列中，反射镜的合理布置可以获得更有效的定位性能。所提出的新方法在DOI探测器模块的大规模生产中具有优势。
A 16/spl times/16/spl times/4 multicrystal detector module to acquire depth of interaction (DOI) information is proposed for a next generation positron emission tomography scanner that realizes high resolution and high sensitivity. The scintillation crystal array is coupled with a 256ch flat panel position sensitive photomultiplier tube (256ch FP-PMT) having large opening area. One unit consists of 2/spl times/2/spl times/4 crystal elements. The units are arranged in 8/spl times/8 array on a 256ch FP-PMT as a DOI detector module. Its crystal identification performance is evaluated by uniform gamma ray irradiation. The measured scintillation events are mapped on a two-dimensional positioning histogram according to the relative ratio of the multianode output of the FP-PMT. However, peaks corresponding to the crystal elements of one unit form a colony in the resultant positioning histogram and there is large space between adjacent colonies. In order to decrease such useless space, we propose a new method of reflector arrangement for the DOI detector module. Preliminary experiments showed that the more effective position performance was obtained with the proper reflector arrangement in the three-dimensional crystal array. The proposed new method has an advantage in mass production of DOI detector modules.
PET 相互作用深度检测器全能量脉冲高度均匀性的改进。
DOI：
--
发表时间：
2003
期刊：
IEEE Trans.Nucl.Sci. 50(5)
影响因子：
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作者：
Kasahara;T.;Murayama;H.;Omura;T.;Yamashita;T.;Ishibashi;H.;Kawai;H.;Inadama;N.;Umehara;T.;Orita;N.;Tsuda;T.
通讯作者：
T.