NDLI: Preliminary design studies of a high sensitivity small animal DOI-PET scanner: jPET-RD

Content Provider	IEEE Xplore Digital Library
Author	Kitamura, K. Yamaya, T. Yoshida, E. Tsuda, T. Inadama, N. Murayama, H.
Copyright Year	2004
Description	Author affiliation: Shimadzu Corp., Kyoto, Japan (Kitamura, K.)
Abstract	We present a preliminary study on the design of a high sensitivity small animal DOI-PET scanner: jPET-RD (for Rodents with DOI detectors), which is under development at the National Institute of Radiological Sciences in Japan. The scanner composed of two rings of six detector blocks arranged in a hexagonal shape with an inner radius of 88 mm. Each detector consists of a four-layer array of 32/spl times/32 scintillator crystals each measuring 1.44/spl times/1.44/spl times/4.5 mm/sup 3/ and a 256ch flat panel position sensitive photomultiplier tube (FP-PS-PMT). The FP-PS-PMT has a large effective area of 49/spl times/49 mm/sup 2/ and multi anodes of 16/spl times/16ch, which can be read out in parallel. We simulated the scanner for various parameters of the number of DOI channels and the length of crystal. Simulated data were reconstructed using the maximum likelihood expectation maximization with accurate system modeling. The trade-off results between background noise and spatial resolution shows that only shortening the length of crystal does not improve the trade-off at all, and that four-layer DOI information improves uniformity of spatial resolution in the whole FOV. Monte Carlo simulations were also performed using the EGS4 code to measure absolute sensitivity and count rate capability with a small cylindrical phantom. We also evaluated the impact of critical design parameters on the noise equivalent count rate (NECR) and LOR errors caused by inter-crystal Compton scatters. Simulation results show that this scanner can achieve high sensitivity and high NECR, which can be further improved by using an appropriate anode segmentation of the FP-PS-PMT.
Starting Page	3896
Ending Page	3900
File Size	821794
Page Count	5
File Format	PDF
ISBN	0780387007
ISSN	10823654
e-ISBN	0780387015
DOI	10.1109/NSSMIC.2004.1466730
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-10-16
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Animals Anodes Spatial resolution Rodents Shape Position sensitive particle detectors Sensor arrays Crystals Position measurement Photomultipliers
Content Type	Text
Resource Type	Article

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