A TOF-PET prototype with position sensitive PMT readout

• Published in: Chinese physics C Vol. 35; no. 1; pp. 61 - 66
• Main Author: 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
• Format: Journal Article
• Language: English
• Published: IOP Publishing 2011; Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China; Graduate University of Chinese Academy of Sciences,Beijing 100049,China%Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China
• Subjects: 位置灵敏光电倍增管; 正电子发射; 计算机断层扫描; 飞行时间; spatial resolution; LYSO; coincident time resolution; TOF-PET; signal-to-noise ratio
• ISSN: 1674-1137; 0254-3052; 2058-6132
• DOI: 10.1088/1674-1137/35/1/013

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.