Development of an optimised LSO/LuYAP phoswhich detector head for the ClearPET camera

J.b. Mosset, Olivier Devroede, Magalie Krieguer, M. Rey, J.m. Vieira, J.h. Jung, C. Kuntner, M. Streun, Karl Ziemons, Etiennette Auffray, P. Sempere Roldan, P. Lecoq, Peter Bruyndonckx, J.f. Loude, Stefaan Tavernier, Christian Morel

Research output: Contribution to journalArticle

25 Citations (Scopus)


This paper describes the, LSO/LuYAP phoswich detector head developed for the ClearPET small animal PET scanner demonstrator that is under construction in Lausanne within the Crystal Clear Collaboration. The detector head consist's of a dual layer of 8 x 8 LSO and LuYAP crystal arrays coupled to a multi-anode photomultiplier tube (Hamamatsu R7600-M64). Equalistion of the LSO/LuYAP light collection is obtained through partial attenuation of the LSO scintillation light using a thin aluminum deposit of 20-35 nm on LSO and appropriate temperature regulation of the phoswich head between 30 degrees C to 60 degrees C. At 511 keV, typical FWHM energy resolutions of the pixels of a phoswich head amounts to (28 +/- 2)% for LSO and (25 +/- 2)% for LuYAP. The LSO versus LuYAP crystal identification efficiency is better than 98%. Six detector modules have been mounted on a rotating gantry. Axial and tangential spatial resolutions were measured up to 4 cm from the scanner axis and compared to Monte Carlo simulations using GATE. FWHM spatial resolution ranges from 1.3 mm on axis to 2.6 mm at 4 cm from the axis.
Original languageEnglish
Pages (from-to)25-29
Number of pages5
JournalIEEE Transactions on Nuclear Science
Publication statusPublished - Feb 2006

Bibliographical note

Transaction on Nuclear Science, Vol 53, n° 1 (2006) 25-29


  • positron emission tomography
  • phoswich detector
  • depth-of-interaction
  • small animal PET scanner

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