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Proceedings Paper

Count rate performance and deadtime analysis of the new 3D PETRRA PET camera
Author(s): Kevin Wells; Christina Kakana; Robert J. Ott; M. Flower; Antigoni Divoli; Sebastian Meriaux; J. E. Bateman; R. Stephenson; D. Duxbury; E. J. Spill
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Paper 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.

Paper Details

Date Published: 19 December 2001
PDF: 11 pages
Proc. SPIE 4508, Penetrating Radiation Systems and Applications III, (19 December 2001); doi: 10.1117/12.450779
Show Author Affiliations
Kevin Wells, Univ. of Surrey (United Kingdom)
Christina Kakana, Univ. of Surrey (United Kingdom)
Robert J. Ott, Royal Marsden Hospital/Institute of Cancer Research (United Kingdom)
M. Flower, Royal Marsden Hospital/Institute of Cancer Research (United Kingdom)
Antigoni Divoli, Royal Marsden Hospital/Institute of Cancer Research (United Kingdom)
Sebastian Meriaux, Royal Marsden Hospital/Institute of Cancer Research (United Kingdom)
J. E. Bateman, Rutherford Appleton Lab. (United Kingdom)
R. Stephenson, Rutherford Appleton Lab. (United Kingdom)
D. Duxbury, Rutherford Appleton Lab. (United Kingdom)
E. J. Spill, Rutherford Appleton Lab. (United Kingdom)


Published in SPIE Proceedings Vol. 4508:
Penetrating Radiation Systems and Applications III
H. Bradford Barber; Hans Roehrig; F. Patrick Doty; Richard C. Schirato; Edward J. Morton, Editor(s)

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