Title :
Imaging evaluation of CsI(Tl) arrays for scintimammography
Author :
Pani, R. ; Cinti, M.N. ; Scafe, R. ; Soluri, A. ; Pellegriti, R. ; Indovina, L. ; De Vincentis, G. ; Trotta, G. ; Burgio, N. ; Ciavola, C. ; Garibaldi, F. ; Urciuoli, G.M. ; Zavattini, G. ; Di Domenico, G. ; Bollini, D. ; Lanconelli, N. ; Olivo, A. ; Pani
Author_Institution :
Dept. of Exp. Med., Rome Univ., Italy
Abstract :
We propose the use of Hamamatsu R7600-C8 position sensitive photomultiplier tubes (PSPMTs) as a practical tool for imaging in scintimammography, through the evaluation of performance as a function of scintillation array pixellation in collimated configurations. A number of CsI(Tl) scintillating arrays with different pixel size and thickness are tested. The very high intrinsic spatial resolution of R7600 PSPMTs made it easy to implement a look up table to correct accurately the gain nonuniformity response and position distortion. Finally, an SNR analysis of a small tumor in scintimammography as a function of crystal pixellation is performed by means of a simple breast phantom
Keywords :
arrays; caesium compounds; image resolution; mammography; medical image processing; photomultipliers; position sensitive particle detectors; radioisotope imaging; solid scintillation detectors; table lookup; thallium; tumours; CsI(Tl) scintillating arrays; CsI:Tl; Hamamatsu R7600-C8 position sensitive photomultiplier tubes; SNR analysis; breast phantom; collimated configurations; crystal pixellation; gain nonuniformity response correction; imaging evaluation; intrinsic spatial resolution; look up table; pixel size; position distortion correction; scintillation array pixellation; scintimammography; small tumor; Biomedical imaging; Breast neoplasms; Collimators; Imaging phantoms; Nuclear medicine; Performance evaluation; Physics; Pixel; Signal to noise ratio; Spatial resolution;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2000 IEEE
Conference_Location :
Lyon
Print_ISBN :
0-7803-6503-8
DOI :
10.1109/NSSMIC.2000.949361
