1991 Volume 17 Issue 2 Pages 98-105
In order to improve image quality in positron emission tomography (PET), a PET device needs to achieve full utilization of emitting photons, and it must be intimately linked to any 3D image reconstruction algorithm. Both the analytical and the iterative 3D reconstruction algorithms suitable for 3D PET systems are classified and evaluated from a computational point of view. For the analytical algorithms, the computation time is analyzed briefly and the required performances of a computer for 3D PET systems are provided. It is suggested that successful utilization of their algorithms depends not only on the performances of a computor, but also on the size of the image space due to the practical constraints of detected photon counts. Some guidelines are provided for the choice of an appropriate reconstruction algorithm in a given situation.
