Abstract
The PETRRA positron camera consists of two 60 cm×40 cm annihilation photon detectors mounted on a rotating gantry. Each detector contains large BaF 2 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 ∼30% per detector. The count-rates obtained, from a 20 cm diameter by 11 cm long water filled phantom containing 90 MBq of 18F, were ∼1.25×10 6 singles and ∼1.1×10 5 cps raw coincidences, limited only by the read-out system dead-time of ∼4 μs. The count-rate performance, sensitivity and large FoV make the camera ideal for whole-body imaging in oncology.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
