Fully 3D GPU PET reconstruction

GPU - based Particle Transport for PET Reconstruction

Fully 3D iterative scatter-corrected OSEM for HRRT PET using a GPU.

Accurate scatter correction is especially important for high-resolution 3D positron emission tomographies (PETs) such as high-resolution research tomograph (HRRT) due to large scatter fraction in the data. To address this problem, a fully 3D iterative scatter-corrected ordered subset expectation maximization (OSEM) in which a 3D single scatter simulation (SSS) is alternatively performed with a ...

Detector Modeling Techniques for Pre-Clinical 3D PET Reconstruction on the GPU

In this paper, we present different approaches to the efficient handling of gamma interaction within the detector crystal matrix for ML-EM-based 3D reconstruction algorithms for positron emission tomography (PET). Geometric calculations as well as approximation of inter-crystal scattering in the forward and in the back-projection are calculated on-the-fly by Monte Carlo techniques implemented o...

Performance Evaluation of Scatter Modeling of the GPU-based “Tera-Tomo” 3D PET Reconstruction

In positron emission tomography (PET), photon scattering inside the body causes significant blurring and quantification error in the reconstructed images. To solve this problem we have developed Monte Carlo (MC) based 3D PET reconstruction algorithms implemented on the Graphics Processing Unit (GPU). Our implementation takes multiple Compton scattering into account without any significant addit...

GPU-Based spatially variant SR kernel modeling and projections in 3D DIRECT TOF PET Reconstruction

In this study, we develop GPU-based application to model spatially variant system response (SR) kernels and to perform forwardand back-projection operations with the SR kernels, for DIRECT iterative reconstruction approach. Modeling the spatially variant SR kernels is efficiently done and handled by introducing three kinds of look-up tables (LUTs) and storing them in different kinds of GPU memo...