RISE: Tomographic Image Reconstruction in Positron Emission Tomography

We present results from the application of Reconstructed Image from Simulations Ensemble (RISE) in Positron Emission Tomography (PET). The RISE implementation in PET is evaluated in this report using a 3-D Shepp-Logan software phantom featuring seven 3-D ellipsoids. The dataset was produced in the Geant4 Application for Tomographic Emission, on a cylindrical PET scanner and transformed and stored as a three-dimensional sinogram. Using the appropriate image quality metrics (CC, SSIM), we visually and quantitively compare our results to those obtained with the Maximum Likelihood Expectation Maximization (MLEM) method. The RISE results compare favorably to those of MLEM.