چكيده لاتين :
The basis of Positron Emission Tomography (PET) is the detection of the photons produced, when a positron annihilates with an electron. Conservation of energy and momentum then require that two 511 keV
gamma rays are emitted almost back to back (1800 apart). This method is used to determi ne the spatial distribution of a positron emitting fluid. Verifying the position of a sing le emitting particle in an object instead
of determining the distribution of a positron emitting fluid is the bas is of another technique, which has been named positron emitting particle tracking PEPT and has been developed in Birmingham University. Birmingham University has recently obtained the PET scanner from Hammersmith Hospital which was installed there in 1987.
Thi s scanner cons ists of 32 detector buckets, each includes 128 bismuth gennanate detection elements , which are configured in 8 rings. This scanner has been rebuilt in a flexible geometry and will be used for PEPT studies . Testing the PEPT algorithm on ECAT scanner gives a high data rate, can track approximately accurate at high speed and also has the possibility of making measurements on large vessels .
