Pinhole gamma camera imaging offers the ability to obtain high resolution images from single gamma ray emitting radiotracers playing a reasonable tradeoff between very small field of view (FoV) and sensitivity. On the other hand the total spatial resolution of a pinhole imaging device is predominantly affected by the detector intrinsic spatial resolution for reduced magnification factors. To design very compact pinhole SPET scanners with very high intrinsic spatial resolution, authors investigated a miniature gamma camera based on the newly developed Hamamatsu H8500 flat panel photomultiplier. The PSPMT was coupled to the following scintillation arrays: CsI(Tl) array with 0.2-mm, 1-mm, 1.4-mm pixel size and NaI (Tl) with 1-mm pixel size. The imaging performances were evaluated by Co-57 spot and flood irradiations. NaI(Tl) array shows a better pixel identification for 1 mm pixel size, proving to be a good candidate to make a large area photodetector based on multi PSPMTs closely packed. Although CsI(Tl) array had the smallest pixel size, the low light output limited the best intrinsic spatial resolution to about 0.5 mm.
New devices for imaging in nuclear medicine / Pani, Roberto; Pellegrini, Rosanna; Cinti, Maria Nerina; Carlo, Trotta; Paolo, Bennati; Margherita, Betti; DE VINCENTIS, Giuseppe; Francesco, Cusanno; Franco, Garibaldi; Stefano, Ridolfi; Stan, Majewsky; Benjamin M. W., Tsui. - In: CANCER BIOTHERAPY & RADIOPHARMACEUTICALS. - ISSN 1084-9785. - STAMPA. - 19:1(2004), pp. 121-128. (Intervento presentato al convegno 16th IRIST Meeting tenutosi a CAPRI, ITALY nel 2003) [10.1089/108497804773391766].
New devices for imaging in nuclear medicine
PANI, Roberto;PELLEGRINI, Rosanna;CINTI, Maria Nerina;DE VINCENTIS, Giuseppe;
2004
Abstract
Pinhole gamma camera imaging offers the ability to obtain high resolution images from single gamma ray emitting radiotracers playing a reasonable tradeoff between very small field of view (FoV) and sensitivity. On the other hand the total spatial resolution of a pinhole imaging device is predominantly affected by the detector intrinsic spatial resolution for reduced magnification factors. To design very compact pinhole SPET scanners with very high intrinsic spatial resolution, authors investigated a miniature gamma camera based on the newly developed Hamamatsu H8500 flat panel photomultiplier. The PSPMT was coupled to the following scintillation arrays: CsI(Tl) array with 0.2-mm, 1-mm, 1.4-mm pixel size and NaI (Tl) with 1-mm pixel size. The imaging performances were evaluated by Co-57 spot and flood irradiations. NaI(Tl) array shows a better pixel identification for 1 mm pixel size, proving to be a good candidate to make a large area photodetector based on multi PSPMTs closely packed. Although CsI(Tl) array had the smallest pixel size, the low light output limited the best intrinsic spatial resolution to about 0.5 mm.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
