Author/Authors :
Llosل، نويسنده , , G. and Barrillon، نويسنده , , P. and Barrio، نويسنده , , J. and Bisogni، نويسنده , , M.G. and Cabello، نويسنده , , J. and Del Guerra، نويسنده , , A. and Etxebeste، نويسنده , , A. and Gillam، نويسنده , , J.E. and Lacasta، نويسنده , , C. Ryan Oliver، نويسنده , , J.F. and Rafecas، نويسنده , , M. and Solaz، نويسنده , , C. and Stankova، نويسنده , , V. and de La Taille، نويسنده , , C.، نويسنده ,
Abstract :
A high resolution PET detector head for small animal PET applications has been developed. The detector is composed of a 12 mm × 12 mm continuous LYSO crystal coupled to a 64-channel monolithic SiPM matrix from FBK-irst. Crystal thicknesses of 5 mm and 10 mm have been tested, both yielding an intrinsic spatial resolution around 0.7 mm FWHM with a position determination algorithm that can also provide depth-of-interaction information. The detectors have been tested in a rotating system that makes it possible to acquire tomographic data and reconstruct images of 22Na sources. An image reconstruction method specifically adapted for continuous crystals has been employed. The Full Width at Half Maximum measured from a point source reconstructed with ML–EM was 0.7 mm with the 5 mm crystal and 0.8 mm with the 10 mm crystal.
Keywords :
PET , Monolithic crystals , high resolution , SiPM , MG-APD , Position determination
