A compact planar positron imaging system
A compact planar positron imaging system
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DOI：
10.1016/j.nima.2003.08.165
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发表时间：
2004-01-11
影响因子：
1.4
通讯作者：
Yamashita, T
中科院分区：
文献类型：
--
作者：
Uchida, H;Okamoto, T;Yamashita, T
研制了一种正电子放射性示踪剂平面成像系统，并对其物理性能进行了评价。新器件由两个相对的平面探测器组成，每个探测器有4(列)×6(行)探测器或单元，每个单元由10×10个2x2×20 mm(3)柱的Bi(4)Gey(3)O(12)(BGO)闪烁体和一个金属封装的位置灵敏光电倍增管组成。该系统非常紧凑，具有简单的结构，允许在水平或垂直模式下对探测器进行多种定位。焦平面图像是由相对的平面探测器收集的符合数据构建的。该系统即使在短时间内或示踪剂活性较低的情况下也能提供高质量的图像。整个视野的空间分辨率达到了1.6-2.1 mm的半高宽。在均匀平面体模中测得灵敏度为107cps/kBq/ml。在这项研究中，通过放射性示踪剂在大鼠和植物中的分布成像，证明了新系统的能力。(C)2003爱思唯尔B.V.保留所有权利。
A planar imaging system for positron-emitting radiotracers was developed and its physical performance was evaluated. The new device consists of two opposing planar detectors, each having 4 (columns) x 6 (rows) detect or units, and each unit composed of 10 x 10 arrays of 2 x 2 x 20 mm(3) pillars of Bi(4)Gey(3)O(12) (BGO) scintillators and a metal-packaged position-sensitive photomultiplier tube. The system is very compact and has a simple structure that allows versatile positioning of detectors in the horizontal or vertical mode. Focal plane images are constructed from coincidence data collected by opposing planar detectors. The system provides good quality images even in a short period of time or with low tracer activity. Spatial resolutions of 1.6-2.1 mm FWHM were achieved for the entire field of view. The sensitivity was 107 cps/kBq/ml measured in a uniform flat phantom. In this study, the capability of the new system was demonstrated by the imaging of radiotracer distribution in rats and plants. (C) 2003 Elsevier B.V. All rights reserved.