1 Scatter Fraction and Noise Equivalent Count Rate performance of the Siemens

GATE (Geant4 Application for Tomographic Emission) is a Monte Carlo simulation platform, based on the Geant4 Monte Carlo code, suitably developed for Nuclear Medicine applications, e.g. for Positron Emission Tomography (PET) and Single Photon Emission Computed Tomography (SPECT) system and dosimetry simulations. GATE is distributed by the OpenGATE collaboration and provides the ability of modelling time-dependent phenomena, such as geometry element movements and source decay kinetics, allowing the simulation of time curves under realistic acquisition conditions. The purpose of this paper was to validate a GATE model for the simulation of the Siemens PET Biograph ™ 6 scanner. This three-dimensional GATE model simulated 24336 LSO (Lutetium Oxyorthosilicate) detectors