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Spatial resolution and depth-of-interaction studies with a PET detector module composed of LSO and an APD array

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4 Author(s)
Fremout, A.A.R. ; Vrije Univ. Brussel, Brussels, Belgium ; Ruru Chen ; Bruyndonckx, P. ; Tavernier, S.P.K.

Detailed results are given for the study of the spatial resolution obtained with different configurations of lutetium oxyorthosilicate (LSO) scintillation crystals read out by a Hamamatsu 2 × 8 avalanche photodiode (APD) array. Block detectors as well as small-sized individual LSO crystals have been coupled to the APD matrix. Both one-to-one coupling and light-sharing schemes were investigated. The spatial resolution is derived for each configuration. Two different configurations with two layers of LSO crystals shifted by half a crystal size with respect to each other are used for investigations on the depth-of-interaction information. Prior to the spatial resolution measurements, a comparison of the light output for various crystal surface treatments and different optical coupling materials has been made.

Published in:

Nuclear Science, IEEE Transactions on  (Volume:49 ,  Issue: 1 )