Imaging performances of the DRAGO gamma camera
Imaging performances of the DRAGO gamma camera
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DOI：
10.1016/j.nima.2009.01.181
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发表时间：
2009-06-01
影响因子：
1.4
通讯作者：
Strueder, L.
中科院分区：
文献类型：
--
作者：
Fiorini, C.;Gola, A.;Strueder, L.
在这项工作中，我们提出的DRAGO伽马相机的实验表征的结果。该相机基于77个硅漂移探测器（SDD）的单片阵列，总有效面积为6.7 cm（2），耦合到单个CsI（Tl）闪烁体晶体，5 mm厚。SDD阵列的使用为闪烁光的检测提供了高量子效率以及非常低的电子噪声。一个非常紧凑的检测模块的基础上使用的集成读出电路已经开发出来。在伽马射线成像中使用这种相机实现的性能在这里报告。当成像0.2mm准直Co-57源（122 keV）在不同的点的活动区，空间分辨率范围在0.25和0.5毫米之间已被测量。由于这里采用的最大似然重建算法，探测器的相互作用能力的深度也已经通过对相对于闪烁体表面倾斜到45度角的准直光束进行成像来研究。(C)2009爱思唯尔有限公司版权所有。
In this work, we present the results of the experimental characterization of the DRAGO gamma camera. This camera is based on a monolithic array of 77 Silicon Drift Detectors (SDDs), with a total active area of 6.7 cm(2), coupled to a single CsI(Tl) scintillator crystal, 5 mm thick. The use of an array of SDDs provides high quantum efficiency for the detection of the scintillation light together with a very low electronics noise. A very compact detection module based on the use of integrated readout circuits has been developed. Performances achieved in gamma-ray imaging using this camera are here reported. When imaging a 0.2mm collimated Co-57 source (122keV) over different points of the active area, a spatial resolution ranging between 0.25 and 0.5 mm has been measured. The depth of interaction capability of the detector, thanks to a maximum likelihood reconstruction algorithm here adopted, has been also investigated by imaging a collimated beam tilted to an angle of 45 degrees with respect to the scintillator Surface. (C) 2009 Elsevier B.V. All rights reserved.