The aim of this paper is to investigate on the spatial resolution limit by coupling a CsI(TI) micro-pixel scintillation array to PSPMTs for ultra-high resolution gamma-ray imaging. To perform this study an array with 0.2 mm pixel side, 0.4 mm pitch, and 1 mm thickness were realized by Spectra Physics (Hilger). The present scintillation arrays technology is suitable to produce large crystal areas. In this paper we present spatial resolution and position results obtained by coupling the micro-pixel scintillation array to Hamamatsu square PSPMTs: 1" R8520-C12, 1" R5900-L16 and 2" H8500 Flat panel PMT. Preliminary measurements demonstrate that micro-pixel array shows better performance coupled to H8500 model, in term of the uniformity response. This setup carries out an intrinsic spatial resolution lower limit of about 0.6 mm FWHM at 50% FWHM energy resolution, defining it as minimum scintillation array pitch detectable at 122 keV. Furthermore, from the results obtained by R5900-L16, the position response will be improved reducing the anode size (3mm size) for a better sampling of the scintillation light.
|Publication status||Published - 2003|
|Event||2003 IEEE Nuclear Science Symposium Conference Record - Nuclear Science Symposium, Medical Imaging Conference - , United States|
Duration: 1 Jan 2003 → …
|Conference||2003 IEEE Nuclear Science Symposium Conference Record - Nuclear Science Symposium, Medical Imaging Conference|
|Period||1/1/03 → …|
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Radiology Nuclear Medicine and imaging
Cinti, M. N., Scafè, R., Pellegrini, R., Trotta, C., Bennati, P., Ridolfi, S., ... Pani, R. (2003). CsI(T1) micro-pixel scintillation array for ultra-high resolution gamma-ray imaging. Paper presented at 2003 IEEE Nuclear Science Symposium Conference Record - Nuclear Science Symposium, Medical Imaging Conference, United States.