Count rate performance and deadtime analysis of the new 3D PETRRA PET camera

Kevin Wells; Christina Kakana; Robert J. Ott; M. Flower; Antigoni Divoli; Sebastian Meriaux; J. E. Bateman; R. Stephenson; D. Duxbury; E. J. Spill

doi:10.1117/12.450779

19 December 2001 Count rate performance and deadtime analysis of the new 3D PETRRA PET camera

Kevin Wells, Christina Kakana, Robert J. Ott, M. Flower, Antigoni Divoli, Sebastian Meriaux, J. E. Bateman, R. Stephenson, D. Duxbury, E. J. Spill

Author Affiliations +

Proceedings Volume 4508, Penetrating Radiation Systems and Applications III; (2001) https://doi.org/10.1117/12.450779
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

We report on the count-rate performance of the unique PETRRA positron camera at activities up to 60MBq. The camera consists of two large area detectors, each comprising a tiled array of 10mm thick BaF₂ scintillation crystals interfaced to a multi-step avalanche chamber filled with 4.2mbar of pure TMAE vapor. Preliminary results demonstrate coincident count rates of over 80kcps for a cylindrical (20x20cm³) phantom with 50MBq of F-18 in the field-of-view using a 20ns coincidence time window. Each component of the readout cycle has been characterized in terms of dead-time loss. The camera's dead-time related count loss is well-described by a paralysable model with a dead-time of ~500ns. Other sources of count rate loss are also discussed.

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Kevin Wells, Christina Kakana, Robert J. Ott, M. Flower, Antigoni Divoli, Sebastian Meriaux, J. E. Bateman, R. Stephenson, D. Duxbury, and E. J. Spill "Count rate performance and deadtime analysis of the new 3D PETRRA PET camera", Proc. SPIE 4508, Penetrating Radiation Systems and Applications III, (19 December 2001); https://doi.org/10.1117/12.450779

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