Exploitable results Gamma ray detector for use in position emission tomography A small diameter positron emission tomograph (PET) dedicated to animal imaging using BaF2 crystals and a photosensitive wire chamber with tetrakis-dimethylamine-ethylene (TMAE), has been designed and built. It consists of a cylindrical ring with an internal diameter of 20 cm containing 2958 BaF2 crystals. The lack of septa in the design allows for 3-dimensional data aquisition and reconstruction. The physical characteristics are as follows: the detection efficiency for one 511 keV photon is 38%; the sensitivity as measured with a 68 Ge point source at the centre is 32000 cps per MBq; the tangential resolution (FWHM) varies from 2.6 mm at the centre to 4.5mm at a position 50 mm radially off centre; the radial resolution (FWHM) varies from 2.6 mm at the centre to 6.4 mm at 50 mm radially off centre and the axial resolution is 3.5 mm; the coincidence time resolution (FWHM) is 19 ns, which allows the use of a time window of 25 ns. Good quality of tumour bearing rats have been recorded. Searching for OpenAIRE data... There was an error trying to search data from OpenAIRE No results available
