Development of a sub-miniature gamma camera for multimodal imaging system
Development of a sub-miniature gamma camera for multimodal imaging system
复制标题
用于多模态成像系统的超小型伽玛相机的开发
DOI：
10.1016/j.nima.2018.12.020
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发表时间：
2020
影响因子：
1.4
通讯作者：
Kisung Lee
中科院分区：
文献类型：
--
作者：
Young;S. Jeong;E. Min;Min;Hakjae Lee;Y. Quan;J. Rho;K. Kim;H. Kim;Kisung Lee
在最近的过去，伽玛射线成像探测器已经实现了小于1毫米的内在空间分辨率在几厘米的有用的视场（UFOV）。与传统伽玛相机体积大、重量重不同，紧凑的伽玛射线成像探测器可以提高伽玛相机在各个领域的性能。在这项研究中，我们开发了一种用于多模态成像系统的亚微型伽马相机。该相机有一个伽马射线探测器、微型电子模块和一个发散孔准直器。探测器由亚毫米像素化Ce: GAGG阵列和硅光电倍增管（SiPM）阵列模块组成。我们根据功能对微电子模块进行了组织；一个MPPC基板，模拟信号处理板，集成电源板和紧凑的数据采集（DAQ）基板。发散孔准直器拓宽了探测器UFOV对伽马相机的成像区域。在探测器侧，每个孔和间隔的尺寸与闪烁体阵列反射器的像元和像元间厚度相同。为了进行内在性能测试，我们获得了729 （27× 27）闪烁体像素的洪水地图图像，能量直方图的能量分辨率为18.9%，能量直方图的能量分辨率为99m Tc （140 keV）。对于外部性能测试，我们使用了57co片源，并使用毛细管制作了99m Tc线源。光源位于距准直器表面10厘米处。成像区域比探测器的UFOV宽三倍。系统灵敏度为19 CPM/μ Ci，空间分辨率为3.5 mm。由于其紧凑性和新颖性，所提出的伽马相机的可用性将不局限于现有的应用。
In the recent past, gamma-ray imaging detectors have achieved an intrinsic spatial resolution of less than 1 mm within a few centimeters of a useful field of view (UFOV). Unlike to conventional gamma cameras, which are large and heavy, the compact gamma-ray imaging detectors can improve the performances of the gamma cameras used in the various fields. In this study, we developed a sub-miniature gamma camera for a multimodal imaging system. The camera has a gamma-ray detector, miniature electronics modules, and a diverging hole collimator. The detector consisted of the sub-millimeter pixelated Ce: GAGG array and the silicon photomultiplier (SiPM) array module. We organized the miniature electronics modules according to the functions; an MPPC base board, analog signal processing board, integrated power supply board, and compact data acquisition (DAQ) base board. The diverging hole collimator widened an imaging area of the gamma camera from the UFOV of the detector. On the detector side, dimensions of each hole and septa were identical to the pixel and inter-pixel thickness of the reflector of scintillator array. For the intrinsic performance test, we acquired a flood map image of 729 (27× 27) scintillator pixels, and the energy resolution was 18.9% for an integrated energy histogram of 99m Tc (140 keV). For the extrinsic performance test, we used the 57 Co sheet source, and made a 99m Tc line source using a capillary tube. The sources located at 10 cm apart from the collimator surface. The imaging area was three times wider than the UFOV of the detector. The system sensitivity was 19 CPM/μ Ci and the spatial resolution was 3.5 mm. The usability of the proposed gamma camera will not be confined to existing applications due to its compactness and novelty.
影响因子：
3.5
作者：
S. Yamamoto;Junkichi Satomi;T. Watabe;H. Watabe;Y. Kanai;M. Imaizumi;E. Shimosegawa;J. Hatazawa
通讯作者：
S. Yamamoto;Junkichi Satomi;T. Watabe;H. Watabe;Y. Kanai;M. Imaizumi;E. Shimosegawa;J. Hatazawa