Feb 15 – 19, 2016
Vienna University of Technology
Europe/Vienna timezone

Development of High-Resolution Detector Module with Depth of Interaction Identification for Positron Emission Tomography

Feb 18, 2016, 2:25 PM
20m
EI9 (Vienna University of Technology)

EI9

Vienna University of Technology

Gusshausstraße 27-29, 1040 Wien
Talk Medical Applications Medical Applications

Speaker

Tahereh Niknejad (LIP)

Description

We have developed a Time-of-flight high resolution and commercially viable SiPM based detector modules for the application in the new positron emission mammography (new ClearPEM) and other small organ specific PET scanners. The detector module has a single side readout and 4-to-1 coupling between LYSO crystals and SiPM, as opposite to the 1-to-1 coupling and double-side readout (with APDs) currently implemented into the ClearPEM. The crystal array consists of 8x8 pixels each with1.53x1.53x15 mm3 separated by reflective foils. The crystal array is optically coupled to 4x4 SiPM array and readout by a high performance front-end ASIC with TDC capability (50 ps time binning). Optical simulations of the detector module has been done in Geant4 to study the different crystal surface treatments, as well as several coupling configurations between scintillators and SiPM to optimize the performance of the module. In this paper we present the results for two detector modules being one made up of crystal pixels with all sides polished capable of identifying all 64 crystals and another one made up of crystal pixels with the longer sides unpolished to get both depth of interaction and crystal identification. The preliminary results show a timing resolution of 375 ps, an average DOI resolution of 3 mm sigma and an average energy resolution of 28% FWHM.

Primary author

Co-authors

Agostino Di Francesco (LIP Laboratorio de Instrumentacao e Fisica Experimental de Part) Carlos Leong (PETSys Electronics SA) Etiennette Auffray Hillemanns (CERN) Gianluca Stringhini (Universita & INFN, Milano-Bicocca (IT)) Joao Varela (LIP Laboratorio de Instrumentacao e Fisica Experimental de Part) Jose Carlos Rasteiro Da Silva (LIP Laboratorio de Instrumentacao e Fisica Experimental de Part) Luis Ferramacho (PETSys Electronics SA) Manuel Rolo (LIP) Marco Paganoni (Universita & INFN, Milano-Bicocca (IT)) Marco Pizzichemi (Universita & INFN, Milano-Bicocca (IT)) Miguel Silveira (LIP Lisbon) Paul Rene Michel Lecoq Ricardo Bugalho (LIP) Rui Silva (LIP) Stefaan Tavernier (Vrije Universiteit Brussel (BE))

Presentation materials