NDLI: Development of new high resolution detectors for small animal SPECT imaging

Content Provider	IEEE Xplore Digital Library
Author	MacDonald, L.R. Iwanczyk, J.S. Patt, B.E. Tull, C.R. Acton, P.D. Kung, H.F. Tsui, B.M.W.
Copyright Year	2000
Abstract	Summary form only received as follows: New high-resolution gamma-ray detectors are being developed for SPECT imaging of animals. Optimal collimators, reconstruction algorithms and image processing are an important part of the development of animal SPECT. These issues and recent advances in miniature gamma-ray detectors will be presented. Two lines of technical developments are being followed for high-performance gamma-ray imaging systems: the first uses state-of-the-art position-sensitive photomultiplier tubes (PS-PMTs); the second uses silicon-based photodiode detector arrays. Each are coupled to arrays of scintillation crystals. A small system has been assembled with newly developed PS-PMTs that has 1 mm CsI(Na) crystals and was fitted with a hexagonal parallel hole collimator (1.25 mm holes, 0.25 mm septa, 2 cm long). Line spread functions (LSF) were measured with 0.5 mm line sources filled with Tc-99m. The average FWHM of the LSF curves were 2.12/spl plusmn/0.16 mm and 2.63/spl plusmn/0.15 mm for 0 cm and 1 cm source-collimator distance, respectively. A LSF was made with 1.1 mm pitch (0.85 mm CsI(Tl), 0.25 mm spacing) CsI(Tl)-PIN detector collimated with matching geometry 1 cm long collimator. Mean FWHM=1.91/spl plusmn/0.32 mm. Preliminary images from each system are presented.
File Size	45166
File Format	PDF
ISBN	0780365038
ISSN	10823654
DOI	10.1109/NSSMIC.2000.949353
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-10-15
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Animals Collimators Gamma ray detectors Crystals High-resolution imaging Optical imaging Reconstruction algorithms Image processing Nuclear imaging Photomultipliers
Content Type	Text
Resource Type	Article

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