Modeling GE advance PET-scanner using FLUKA simulation code

The general-purpose particle transport code, FLUKA, was used to model the GE Advance Positron Emission Tomography (PET) scanner (GEMS). The required spatial and energy data were extracted using the FLUKA phase space card, USERDUMP, with its user-routine, mgdraw, consisting of full-events information. Several point and volumetric sources were modeled and the corresponding locations of the sources were identified using three different proposed algorithms which eliminate the use of conventional image-reconstruction packages. Also, having extracted the time information, the time-of-flight approach in PET (TOF-PET) was used to reconstruct the images of several volumetric positron-emitting sources, representing the best results according to the chi-square analysis data. The post-processing calculations, both on CPU and GPU, were undertaken either with MATLAB or Fortran programming.