Development of a compact high resolution gamma-ray detector for E-CT applications

ADVANCED NUCLEAR INSTRUMENTATION AND DETECTION

Development of a compact high resolution gamma-ray detector for E-CT applications

ZHU Jie，

MA Hongguang，

MA Wenyan，

ZENG Hui，

WANG Zhaomin，

XU Zizhong

Nuclear Science and Techniques

Vol.18, No.5

pp.302-306

Published in print 20 Oct 2007

DOI：10.1016/S1001-8042(07)60066-9

CLC：TL812,R730.44

33302

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.

E-CTPixels arrayPSPMTPosition linearitySpatial resolution

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