We present a mean square estimation (MSE) based algorithm for position calculation of a scintillation gamma camera dedicated to single photon imaging. The photodetector consist of a 22 array of Hamamatsu H8500C-Mod8 segmented-anodes PMT (1010 cm detection area)coupled to an array of NaI(Tl) scintillation crystals with 1.8 mm pixel size. Phototubes are read out by a 256-independent channels electronics each reading simultaneously all the anodes of the MA-PMT. We analyzed position linearity and spatial resolution where the scintillation points are calculated both with MSE and with a standard center of gravity (CoG) algorithm, and with particular attention to the crystal edge and between tubes. The MSE algorithm improves the pixel identification and the linearity, and expands the useful field of view (UFOV) up to the whole detection area of the gamma cameras. In conclusion, MSE showing a greater advantage with respect to the CoG algorithm. © 2010 IEEE.
A Full-FOV iterative algorithm applied to pixilated scintillation crystal / A., Fabbri; F., De Notaristefani; V. O., Cencell; P., Bennati; M. N., Cinti; F., Petulla; Pellegrini, Rosanna; DE VINCENTIS, Giuseppe; Pani, Roberto. - ELETTRONICO. - (2010), pp. 1483-1485. (Intervento presentato al convegno 2010 IEEE Nuclear Science Symposium, Medical Imaging Conference, NSS/MIC 2010 and 17th International Workshop on Room-Temperature Semiconductor X-ray and Gamma-ray Detectors, RTSD 2010 tenutosi a Knoxville, TN nel 30 October 2010 through 6 November 2010) [10.1109/nssmic.2010.5874021].
A Full-FOV iterative algorithm applied to pixilated scintillation crystal
PELLEGRINI, Rosanna;DE VINCENTIS, Giuseppe;PANI, Roberto
2010
Abstract
We present a mean square estimation (MSE) based algorithm for position calculation of a scintillation gamma camera dedicated to single photon imaging. The photodetector consist of a 22 array of Hamamatsu H8500C-Mod8 segmented-anodes PMT (1010 cm detection area)coupled to an array of NaI(Tl) scintillation crystals with 1.8 mm pixel size. Phototubes are read out by a 256-independent channels electronics each reading simultaneously all the anodes of the MA-PMT. We analyzed position linearity and spatial resolution where the scintillation points are calculated both with MSE and with a standard center of gravity (CoG) algorithm, and with particular attention to the crystal edge and between tubes. The MSE algorithm improves the pixel identification and the linearity, and expands the useful field of view (UFOV) up to the whole detection area of the gamma cameras. In conclusion, MSE showing a greater advantage with respect to the CoG algorithm. © 2010 IEEE.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
