Performance characteristics of the novel PETRRA positron camera
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The PETRRA positron camera consists of two 60 cm x 40 cm annihilation photon detectors mounted on a rotating gantry. Each detector contains large BaF2 scintillators interfaced to large area multiwire proportional chambers filled with a photo-sensitive vapour (tetrakis-(dimethylamino)-ethylene). The spatial resolution of the camera has been measured as 6.5 +/- 1.0 mm FWHM throughout the sensitive field-of-view (FoV), the timing resolution is between 7 and 10 ns FWHM and the detection efficiency for annihilation photons is similar to30% per detector. The count-rates obtained, from a 20 cm diameter by 11 cm long water filled phantom containing 90 MBq of F-18, were similar to1.25 x 10(6) singles and similar to1.1 x 10(5) cps raw coincidences, limited only by the read-out system dead-time of similar to4 mus. The count-rate performance, sensitivity and large FoV make the camera ideal for whole-body imaging in oncology. (C) 2002 Elsevier Science B.V. All rights reserved.
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NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2002, 477 pp. 475 - 479
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