Nuclear medicine imaging devices commonly use multi-element photo detection systems, composed of an array of NxN elements, each one providing an individual signal. Many strategies have been developed to reduce the number of readout channels, one of the main approaches is the Rows and Columns (R/C) projection logic. In this paper we proposed a modified version of Raised To the Power (RTP) algorithm adapted to R/C logic. In order to validate its efficiency a linear scanning irradiation on two 49x49mm2 LaBr3:Ce (0.5%) crystals with different thickness (4mm and 10 mm) was carried out. Imaging performance analysis was made in terms of position linearity, Field-of-View (FoV) enlargement and spatial resolution. Imaging results from Anger Logic, RTP algorithm based on single element readout and RTP algorithm based on R/C readout were compared. A notable advantage of using RTP algorithms instead of Anger Logic was found: the FoV widens from about 30% to more than 70% of the detector area whereas the spatial resolution is highly improved, especially for off-center interactions, both for 4 mm-thick and 10 mm-thick crystals. Furthermore, imaging performance with the R/C readout is just slightly different from the single element one (FoV reduction less than 7% and SR worsening less than 10%). The R/C adapted RTP algorithm opens doors to high imaging performance with a substantial reduction of complexity and cost in the readout electronics.

Position algorithm for monolithic scintillation crystals based on charge projection readout / Pani, Roberto; Bettiol, Marco; Preziosi, Enrico; Cinti, Maria Nerina; Borrazzo, Cristian; Pellegrini, Rosanna; Castro, E. Di; Fabbri, Andrea. - STAMPA. - 11:01(2016), pp. C01061-C01061. [10.1088/1748-0221/11/01/C01061]

Position algorithm for monolithic scintillation crystals based on charge projection readout

PANI, Roberto;BETTIOL, MARCO;PREZIOSI, ENRICO;CINTI, Maria Nerina;BORRAZZO, CRISTIAN;PELLEGRINI, Rosanna;FABBRI, ANDREA
2016

Abstract

Nuclear medicine imaging devices commonly use multi-element photo detection systems, composed of an array of NxN elements, each one providing an individual signal. Many strategies have been developed to reduce the number of readout channels, one of the main approaches is the Rows and Columns (R/C) projection logic. In this paper we proposed a modified version of Raised To the Power (RTP) algorithm adapted to R/C logic. In order to validate its efficiency a linear scanning irradiation on two 49x49mm2 LaBr3:Ce (0.5%) crystals with different thickness (4mm and 10 mm) was carried out. Imaging performance analysis was made in terms of position linearity, Field-of-View (FoV) enlargement and spatial resolution. Imaging results from Anger Logic, RTP algorithm based on single element readout and RTP algorithm based on R/C readout were compared. A notable advantage of using RTP algorithms instead of Anger Logic was found: the FoV widens from about 30% to more than 70% of the detector area whereas the spatial resolution is highly improved, especially for off-center interactions, both for 4 mm-thick and 10 mm-thick crystals. Furthermore, imaging performance with the R/C readout is just slightly different from the single element one (FoV reduction less than 7% and SR worsening less than 10%). The R/C adapted RTP algorithm opens doors to high imaging performance with a substantial reduction of complexity and cost in the readout electronics.
2016
Gamma camera, SPECT, PET PET/CT, coronary CT angiography (CTA), Medical-image econstruction methods and algorithms, Computer-aided software
01 Pubblicazione su rivista::01a Articolo in rivista
Position algorithm for monolithic scintillation crystals based on charge projection readout / Pani, Roberto; Bettiol, Marco; Preziosi, Enrico; Cinti, Maria Nerina; Borrazzo, Cristian; Pellegrini, Rosanna; Castro, E. Di; Fabbri, Andrea. - STAMPA. - 11:01(2016), pp. C01061-C01061. [10.1088/1748-0221/11/01/C01061]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/856702
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