An educational tool for demonstrating the TOF-PET technique

T. Bäck, J. Cederkäll, B. Cederwall, A. Johnson, A. Kerek, W. Klamra, J. Van Der Marel, J. Molnár, D. Novák, D. Sohler, M. Steèn, P. Uhlèn

Research output: Contribution to journalArticle

5 Citations (Scopus)


A detector system for positron emission tomography with time-of-flight capability has been built to serve as an educational tool for undergraduate students. The set-up consists of 48 BaF2 scintillator crystals, each coupled to a fast photo-multiplier tube, mounted in a circular geometry. The analogue detector pulses are handled by fast constant fraction discriminators. A dedicated unit reduces the 48 channels to eight channels via delay-line encoding, and the signals are then fed to an eight channel fast time-to-digital converter. A VME processor sorts the events and sends them to a workstation where the coincident events are extracted. The time resolution of the detectors together with fast VME based electronics allows for time-of-flight measurements to improve on the signal-to-noise ratio in the reconstructed images. The system can be used for different types of exercises for the students, varying from the fundamentals of scintillator detectors to advanced image reconstruction. The set-up is described and some results are presented.

Original languageEnglish
Pages (from-to)200-204
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number1-2
Publication statusPublished - Dec 1 2001


  • Medical imaging
  • PET

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

Fingerprint Dive into the research topics of 'An educational tool for demonstrating the TOF-PET technique'. Together they form a unique fingerprint.

  • Cite this