A TOF-PET system for educational purposes
2002 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, Vol. 477, no 03-jan, 82-87 p.Article in journal (Refereed) Published
A TOF-PET system has been designed and constructed for educational purposes. The aim of this system is to demonstrate the possibilities of positron emission tomography in general and the time-of-flight method in particular to the students of various courses at the Royal Institute of Technology, Stockholm, Sweden. The set-up consists of 48 small BaF2 crystals coupled to fast photomultipliers placed in a ring geometry. The signals of the photomultipliers are fed into fast constant fraction discriminators (CFD). The outputs of these are directed to a specially designed logic VME unit. which combines the CFD signals of 6 neighbouring channels to one signal by adding a different delay to each channel. The logic circuitry produces a prompt pulse for each event that serves as the start pulse for the 8-channel fast TDC. The delayed pulses act as the stop pulses for the TDC. In a computer. the measured times are converted into information about which the photomultipliers fired with the difference in the time of flight. The set-up is described and the results are presented.
Place, publisher, year, edition, pages
Elsevier, 2002. Vol. 477, no 03-jan, 82-87 p.
time-of-flight, positron emission tomography, data acquisition
IdentifiersURN: urn:nbn:se:kth:diva-21323DOI: 10.1016/S0168-9002(01)01913-1ISI: 000173886100016OAI: oai:DiVA.org:kth-21323DiVA: diva2:340021
QC 201005252010-08-102010-08-102015-04-29Bibliographically approved