We report on a new design of the detector module with depth of interaction (DOI) based on a quasi-monolithic lutetium oxyorthosilicate (LSO) crystal, a multi-channel sensor and a maximumlikelihood position-estimating (MLPE) algorithm. In our detector design, two layers of quasimonolithic crystal elements are stacked crosswise. Each layer consists of eight crystals, which are separated from each other in one direction and are monolithic in the other direction. The size of each crystal is 2.0 × 16.0 × 10.0 mm 3. The light transport and detection in the cross-stack quasimonolithic detector were modeled using the DETECT2000 code and the lookup tables (LUTs) were built using simulations. Events were well separated by applying the MLPE method with a 2.0-mm spatial resolution in the X-Y plane and for four depths in the DOI direction. The results demonstrated that the proposed detector provided dependable positioning capability for a small animal positron emission tomography (PET).
- Depth of interaction
- Maximum-likelihood position estimating
- Monolithic crystal
ASJC Scopus subject areas
- Physics and Astronomy(all)