High spatial resolution measurement of depth-of-interaction of a PET LSO crystal
2005 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, Vol. 546, no 1-2, 33-36 p.Article in journal (Refereed) Published
A new type of experimental technique to investigate the depth- of-interaction (DOI) dependence in small scintillator elements designed for high-resolution animal PET is tested. An Oxford-type nuclear microprobe was used to irradiate a lutetium oxyorthosilicate (LSO) crystal (2 x 2 x 10 mm) with a highly focused, (few micrometers diam.), 2 MeV He+ beam. Pulse height spectra from a PMT attached to one end of the LSO crystal were collected in list mode. By scanning the beam over the crystal high-resolution 2D-images are generated and thus the DOI effect in the scintillator could be investigated. The obtained results of the overall DOI dependence confirm previous findings using gamma-rays. Since the present experimental setup allows obtaining data with several orders of magnitude better spatial resolution than with collimated gamma-beam, the method can be applied for variety of problems where high spatial resolution is required.
Place, publisher, year, edition, pages
2005. Vol. 546, no 1-2, 33-36 p.
nuclear microprobe, PET, depth-of-interaction (DOI), photomultiplier, scanning proton microprobe, detector
Medical Equipment Engineering
IdentifiersURN: urn:nbn:se:kth:diva-14893DOI: 10.1016/j.nima.2005.03.036ISI: 000230288200007ScopusID: 2-s2.0-20444434756OAI: oai:DiVA.org:kth-14893DiVA: diva2:332934
QC 20100525 QC 201110112010-08-052010-08-052011-10-11Bibliographically approved