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Development of a compact high resolution gamma-ray detector for E-CT applications 被引量:2
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作者 ZHU Jie MA Hongguang +3 位作者 MA Wenyan ZENG Hui WANG Zhaomin xu zizhong 《Nuclear Science and Techniques》 SCIE CAS CSCD 2007年第5期302-306,共5页
A compact gamma-ray detector with good spatial resolution for emission computed tomography (E-CT) applications has been developed. The detector is composed of NaI(Tl) scintillation pixels array and Hamamastu R2486-05 ... A compact gamma-ray detector with good spatial resolution for emission computed tomography (E-CT) applications has been developed. The detector is composed of NaI(Tl) scintillation pixels array and Hamamastu R2486-05 PSPMT. Having a pixel size of 2 mm × 2 mm and an overall dimension of 48.2 mm × 48.2mm × 5 mm, it has 484 pixels in a 22×22 matrix. An average spatial resolution of 2.5mm (FWHM) was achieved. The slope of position linearity is constant within 10% in a range of 40mm. After corrections, the average value of differential non-linearity and absolute non-linearity were 0.16mm and 0.535mm respectively, and a 17% at FWHM of total energy resolution for 241Am was obtained. 展开更多
关键词 探测器 闪烁探测 放射线 程序软件
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A compact gamma camera with scintillation array and parallel-hole collimator 被引量:1
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作者 ZHU Jie MA Hongguang +3 位作者 MA Wenyan ZENG Hui WANG Zhaomin xu zizhong 《Nuclear Science and Techniques》 SCIE CAS CSCD 2008年第5期297-301,共5页
A new compact gamma camera for small object imaging has been developed.It consists of a pixelized Nal(T1) scintillator array coupled to a position sensitive photomultiplier tube (Hamamatsu R2486) with a parallel-hole ... A new compact gamma camera for small object imaging has been developed.It consists of a pixelized Nal(T1) scintillator array coupled to a position sensitive photomultiplier tube (Hamamatsu R2486) with a parallel-hole lead collimator.The compact camera has better spatial resolution than Anger camera.The average value of intrinsic spatial resolutions is 2.3 mm (FWHM).The overall spatial resolution (FWHM) is 3,5 and 6 mm at 0,2.5 and 3 mm SCD (source-to-collimator distance),respectively.The phantom studies with the compact camera have demonstrated that parallel-hole collimator gamma camera is a practical technique for nuclear medicine application. 展开更多
关键词 核医学 肿瘤诊断 γ照相机 并行孔准直仪
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A compact gamma-ray detector using wavelength-shifting fibers coupled to YAP scintillation crystal 被引量:1
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作者 ZHU Jie MA Hongguang +3 位作者 MA Wenyan ZENG Hui WANG Zhaomin xu zizhong 《Nuclear Science and Techniques》 SCIE CAS CSCD 2008年第1期45-49,共5页
The performance of a compact position sensitive gamma-ray detector based on wavelength-shifting fibers coupled to YAlO3:Ce scintillation crystal was evaluated using a Monte-Carlo simulation method. The simulation mode... The performance of a compact position sensitive gamma-ray detector based on wavelength-shifting fibers coupled to YAlO3:Ce scintillation crystal was evaluated using a Monte-Carlo simulation method. The simulation model has been setup using the GEANT4 codes. Compared with the gamma-ray detector based on the YAlO3:Ce scintillation crystal coupled to Hamamastu R2486 position sensitive photomultiplier tube, the results indicate that the gamma-ray detector based on wavelength-shifting fibers readout has good position linearity, good spatial resolution and larger effective field of view. The image and point spread function of measured point were presented. The spatial resolution response as a function of position was obtained. The factors influencing spatial resolution and position linearity were discussed. 展开更多
关键词 闪烁探测技术 放射线诊断 模拟技术 空间分辨能力
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