Title :
A high-resolution SPECT system based on a microchannel-plate imager
Author :
Dilmanian, F.A. ; Weber, D.A. ; Coderre, J.A. ; Joel, D.D. ; Shi, K.-C. ; Meinken, G.E. ; Som, P. ; Tang, Y.-N. ; Volkow, N.D. ; Yee, C. ; Brill, A.B. ; Watanabe, M. ; Inuzuka, E. ; Oba, K. ; Gerson, R. ; Iida, H. ; Hiruma, A.
Author_Institution :
Med. Dept., Brookhaven Nat. Lab., Upton, NY, USA
fDate :
4/1/1990 12:00:00 AM
Abstract :
The authors have developed a high-resolution single-photon emission computed tomography (SPECT) system for small-animal studies with 125I. The SPECT camera uses a Hamamatsu microchannel-plate imager PIAS (photon-counting image acquisition system), a 0.7-mm-thick NaI(Tl) plate, and a lead-glass parallel-hole collimator. The 15-mm-diameter field of view (FOV) of the PIAS tube was enlarged by an optical fiber faceplate taper to provide a 26-mm camera FOV. Camera absolute sensitivity (counts detected/gamma photons emitted) is 2×10-5 for 125I. The system provides an in-plane resolution of about 0.7 mm FWHM (full width at half maximum) in the reconstructed image for a 15-mm radius of rotation. SPECT images from phantom studies and from organs in the rat and mouse provide examples of the resolving capacity of the system
Keywords :
biomedical equipment; cameras; computerised tomography; image intensifiers; photon counting; radioisotope scanning and imaging; 125I; Hamamatsu microchannel-plate imager PIAS; NaI-Tl; absolute sensitivity; high-resolution SPECT system; in-plane resolution; microchannel-plate imager; mouse; optical fiber faceplate taper; parallel-hole collimator; phantom studies; photon-counting image acquisition system; rat; reconstructed image; single-photon emission computed tomography; small-animal studies; Cameras; Computed tomography; Face detection; Gamma ray detection; Gamma ray detectors; Image reconstruction; Image resolution; Optical collimators; Optical fibers; Single photon emission computed tomography;
Journal_Title :
Nuclear Science, IEEE Transactions on
