Title :
Testing of the spatial resolution and efficiency of scintillating fiber PET modules
Author :
Chaney, R.C. ; Fenyves, E.J. ; Hammack, H. ; Nelson, G. ; Anderson, J.A. ; Antich, P.P. ; Atac, M.
Author_Institution :
Texas Univ., Dallas, Richardson, TX, USA
Abstract :
Two experimental PET (positron emission tomography) camera modules were constructed using (1) two 5-cm*5-cm*2.5-cm detector stacks made of parallel 0.5- and 1.0-mm-diameter scintillating fibers and (2) two 5-cm*5-cm*5-cm detector stacks made of alternating x and y layers of 0.5- and 1.0-mm-diameter scintillating fibers. Each stack was viewed by Hamamatsu R2486 position-sensitive photomultipliers. The time resolution of the coincidence system was 10 ns. The spatial resolution and efficiency of the PET modules were tested using an approximately 1 mu Ci. 0. 5-mm-diameter Na-22 source. The best results were achieved with the 1.0-mm parallel fiber stacks: 2.0-mm spatial resolution (full width at half maximum) and 2.3% efficiency. The possibilities of improving the characteristics of this arrangement and particularly the alternating x and y layer stacks are discussed.<>
Keywords :
biomedical equipment; computerised tomography; radioisotope scanning and imaging; 0.5 micron; 1 micron; 10 ns; 10/sup -5/ Ci; 2.5 cm; 5 cm; Hamamatsu R2486 position-sensitive photomultipliers; PET module efficiency; detector stacks; positron emission tomography; scintillating fiber PET modules; spatial resolution; time resolution; Cameras; Gamma ray detectors; Laboratories; Modular construction; Optical fiber testing; Photomultipliers; Plastics; Position sensitive particle detectors; Positron emission tomography; Spatial resolution;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1991., Conference Record of the 1991 IEEE
Conference_Location :
Santa Fe, NM, USA
Print_ISBN :
0-7803-0513-2
DOI :
10.1109/NSSMIC.1991.259187
