Performance of a PET detector with a 256ch flat panel PS-PMT
Performance of a PET detector with a 256ch flat panel PS-PMT
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配备 256 通道平板 PS-PMT 的 PET 探测器的性能
DOI：
10.1109/nssmic.2002.1239478
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发表时间：
2002
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. Inadama;H. Murayama;M. Watanabe;T. Omura;T. Yamashita;H. Kawai;T. Umehara;T. Kasahara;N. Orita;T. Tsuda
256通道平板位置敏感光电倍增管（FP-PMT）具有开口面积大（52 mm/spl次/ 52 mm）、死腔小等优点，是一种很有前途的PET探测器。FP-PMT的有用面积为开口面积的89%，因此FP-PMT提供与16 /spl次/ 16阵列或具有3 mm /spl次/ 3 mm底部面积的闪烁晶体的光耦合。其14.7mm的厚度也将确保PET设备的紧凑体积和更轻的重量。我们通过将511 keV伽马射线照射到GSO晶体上来评估性能，该晶体与FP-PMT的原型耦合。所得到的定位图像图保证了其用于晶体识别的能力。在一系列的测量中，我们使用多层聚合物反射镜作为探测器的反射器。使用CO/sub 2/气体激光器将其切割或标记为精确尺寸的折叠。用激光在反射镜上制作褶皱有助于由许多小晶体元件组成的检测器的更容易组装，并且可能潜在地用于各种形状的检测器。
A 256ch flat panel position sensitive photomultiplier tube (FP-PMT) is a promising device for a PET detector because of its large opening area, 52mm /spl times/ 52 mm, and small dead space. The useful area of the FP-PMT is 89% to the opening area so that the FP-PMT affords optical coupling with a 16 /spl times/ 16 array or scintillation crystals having 3 mm /spl times/ 3 mm bottom area. Its 14.7 mm thickness will also ensure a compact volume and less weight for the PET apparatus. We evaluated performance by irradiating 511keV gamma ray onto GSO crystals coupled to a prototype of the FP-PMT. The resultant positioning image map assure its capability for crystal identification. In a series of measurements, we used a multilayer polymer mirrors for a reflector of the detector. It was cut or marked for folding in precise sizes using a CO/sub 2/ gas laser. Making folds on the reflector by a laser contributed to easier assembly of the detector composed of many small crystal elements and may potentially be utilized in various shaped detectors.