EVALUATION OF THE KAROLINSKA NEW POSITRON CAMERA SYSTEM - THE SCANDITRONIX PC2048-15B

The PC2048-15B is the brain version of the new generation of Scanditronix positron camera systems, now being installed at the Karolinska Hospital in Stockholm, Sweden. The system has eight rings with 256 (6*12*30 mm3) BGO crystals per ring. Data corresponding to fifteen image slices are simultaneously recorded. The detector rings are based on block-detector units, each with sixteen scintillating crystals mounted on two dual photomultiplier tubes. A system description is given and test results including spatial resolution, sensitivity to true and random coincidences, scatter correction, count rate linearity, spatial independence and reproducibility are presented. Clinical results are in addition discussed, including rCBF studies and receptor studies, to cover the two most extreme situations met in brain PET studies, i.e. high count rate and high resolution requirements. Copyright © 1990 by The Institute of Electrical and Electronics Engineers, Inc.