A TOF-PET prototype with position sensitive PMT readout  

作　　者：陈金达 徐瑚珊 胡正国 陈若富 唐彬 岳珂 余玉洪 章学恒 孔洁 臧永东 王建松 孙志宇 郭忠言 

机构地区：[1]Institute of Modern Physics,Chinese Academy of Sciences [2]Graduate University of Chinese Academy of Sciences

出　　处：《Chinese Physics C》2011年第1期61-66,共6页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (10305015,10475098);West Light Foundation of Chinese Academy of Sciences(0801010XBB);Major Foundation Program of Chinese Academy of Sciences(O701050YZD)

摘　　要：A prototype of time-of-flight positron emission computed tomography （TOF-PET） has been developed for acquiring the coincident detection of 511 keV γ-rays produced from positron annihilation. It consists of two 80.5 minx80.5 mm LYSO scintillator arrays （composed of 35 ×35 pixel finger crystals） with the position sensitive photomultiplier tubes R2487 as the readout. Each array is composed of 2 mm ×2m×15 mm finger crystals and the average pixel pitch is 2.30 mm. The measured results indicate that the TOF information has the potential to significantly enhance the image quality by improving the noise variance in the image recon- struction. The best spatial resolution （FWHM） of the prototype for the pairs of 511 keV T-rays is 1.98 mm and 2.16 mm in the x and y directions, respectively, which are smaller than the average pixel pitch of 2.30 mm.A prototype of time-of-flight positron emission computed tomography （TOF-PET） has been developed for acquiring the coincident detection of 511 keV γ-rays produced from positron annihilation. It consists of two 80.5 minx80.5 mm LYSO scintillator arrays （composed of 35 ×35 pixel finger crystals） with the position sensitive photomultiplier tubes R2487 as the readout. Each array is composed of 2 mm ×2m×15 mm finger crystals and the average pixel pitch is 2.30 mm. The measured results indicate that the TOF information has the potential to significantly enhance the image quality by improving the noise variance in the image recon- struction. The best spatial resolution （FWHM） of the prototype for the pairs of 511 keV T-rays is 1.98 mm and 2.16 mm in the x and y directions, respectively, which are smaller than the average pixel pitch of 2.30 mm.

关 键 词：LYSO TOF-PET spatial resolution signal-to-noise ratio coincident time resolution 

分 类 号：TN152[电子电信—物理电子学]