Agradecimientos:
Part of this work is founded by the IM3 network (G03/185 Ministerio de Sanidad), with grants from the Ministerio de Educación y Ciencia, project TEC2004-07052-C02-01, and
Ministerio de Industria, Turismo y Comercio project FIT-330101-2004-3. J.J. Vaquero has support from the “Ramón y Cajal” Program, Ministerio de Educación y Ciencia
A small animal PET/CT system based on a common rotating gantry is proposed. The PET detection subsystem is composed of two detector modules based on MLS arrays and
four flat panel type PS PMT. The CT subsystem consists in a micro focus X ray tube and a semicoA small animal PET/CT system based on a common rotating gantry is proposed. The PET detection subsystem is composed of two detector modules based on MLS arrays and
four flat panel type PS PMT. The CT subsystem consists in a micro focus X ray tube and a semiconductor X ray detector.
Space for opposed PET detectors and the CT scanner have been allocated on the same plane in such a way that the trans axial
and axial centers are common for both systems. Shielding elements have been placed around the detectors to avoid cross
modality contamination. The gantry can rotate 370 degrees to provide complete data sets for the CT image reconstruction
algorithm that is based on the cone beam geometry. PET image reconstruction is implemented using FBP (2D and 3D) and
OSEM. Sequential acquisition protocols minimize the scan
duration, and CT information can be used to implement PET
imaging corrections. The coplanar configuration of this system
provides intrinsically co registered data sets, and it is not
necessary to reposition the animal to perform any modality
imaging, avoiding undesired animal or additional accessories movements. An additional advantage is the compactness of the system that saves space and allows a direct visual monitoring of the animal during the scan[+][-]
Nota:
Proceeding of: 2005 IEEE Nuclear Science Symposium Conference Record, Puerto Rico, October 23 - 29, 2005
