A Depth-of-Interaction encoding method for SPECT monolithic scintillation detectors. (20th December 2016)

• Record Type: Journal Article
• Authors: Bettiol, M.; Preziosi, E.; Cinti, M.N.; Borrazzo, C.; Fabbri, A.; Cassano, B.; Polito, C.; Pellegrini, R.; Pani, R.
• Is Part Of: Journal of instrumentation. Volume 11:Number 12(2016:Dec.)
• Page Start: C12054
• Page End: C12054
• Publication Date: 2016-12-20
• Subjects: Image reconstruction in medical imaging -- Data processing methods; Scientific apparatus and instruments -- Periodicals; 502.84
• DOI: 10.1088/1748-0221/11/12/C12054
• Languages: English
• ISSNs: 1748-0221

Abstract

Abstract: The Depth of Interaction (DoI) discrimination of gamma-photons within scintillation crystals allows to improve imaging performance in PET scanners as well as in SPECT devices equipped with non-parallel collimators (e. g. pinhole ones). In previous works, the authors experimentally proved the efficiency of a DoI-encoding technique in case of a 20 mm-thick monolithic crystal PET module. For the thinner crystals commonly used in SPECT, DoI determination still remains a challenging goal. To this aim, in this work the authors have experimentally evaluated the DoI-encoding method on a 6 mm-thick monolithic LaBr3 :Ce crystal. The results prove the efficiency and reliability of the proposed method. It indeed allows to discriminate the gamma photons interacting at the the top and the bottom of the crystal.