High precision axial coordinate readout for an axial 3-D PET detector module using a wave length shifter strip matrix
✍ Scribed by A. Braem; E. Chesi; C. Joram; J. Séguinot; P. Weilhammer; R. De Leo; E. Nappi; W. Lustermann; D. Schinzel; I. Johnson; D. Renker; S. Albrecht
- Publisher
- Elsevier Science
- Year
- 2007
- Tongue
- English
- Weight
- 680 KB
- Volume
- 580
- Category
- Article
- ISSN
- 0168-9002
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✦ Synopsis
We describe a novel method to extract the axial coordinate from a matrix of long axially oriented crystals, which is based on wavelength shifting (WLS) plastic strips. The method allows building compact 3-D axial gamma detector modules for PET scanners with excellent 3-D spatial, timing and energy resolution while keeping the number of readout channels reasonably low. A voxel resolution of about 10 mm 3 is expected. We assess the performance of the method in two independent ways, using classical PMTs and G-APDs to read out the LYSO (LSO) scintillation crystals and the WLS strips. We observe yields in excess of 35 photoelectrons from the strips for a 511 keV gamma and reconstruct the axial coordinate with a precision of about 2.5 mm (FWHM).