Publication: Performance evaluation of a new gamma imager for small animal SPECT applications
Loading...
Identifiers
ISSN: 1082-3654
ISBN: 978-1-4244-0922-8
Publication date
2007
Defense date
Advisors
Tutors
Journal Title
Journal ISSN
Volume Title
Publisher
IEEE
Impact
Export
Abstract
Abstract–In this work we characterized a recently developed gamma imager for small animal SPECT applications. The Hamamatsu C9177 is a mini-gamma camera that integrates the detector and all the electronics, including the acquisition system, in a compact and portable housing. The detector is
based on a high resolution parallel hole collimator, a CsI(NaI) crystal array and a PS-PMT (flat panel type). The active field
of view is 41.9 x 41.9 mm2 and the assembly is optimized for 60 to 200 keV. The electronics in the housing includes the high
voltage divider, an ASIC which converts the 64 anodes into Anger-like signals, ADCs which are fed with these signals and
position and energy lookup tables which allow digital information for each detected photon to be obtained directly from the imager. In order to be able to obtain tomographic data and to improve the measurement protocols, we mounted
the detector in a custom-built motorized gantry. We evaluated detector uniformity and energy resolution using a flood field
image. Planar intrinsic spatial resolution and spatial linearity were assessed by stepping a capillary source across the detector surface and plotting the count profile for each individual crystal of the array. We additionally performed phantom
studies to preliminarily characterize the tomographic performance. Energy resolution is 11.6% (mean), sensitivity is 2.54 cps/μCi and planar spatial resolution is 2.4 mm (CFOV
20% energy window) when the source is placed on the detector surface.
Description
Proceeding of: 2007 IEEE Nuclear Science Symposium Conference Record (NSS '07), Honolulu, Hawaii, USA, Oct. 27 - Nov. 3, 2007
Keywords
Bibliographic citation
2007 IEEE Nuclear Science Symposium Conference Record, 2007, vol. 5, p. 3355 - 3360