A cross-stack quasi-monolithic detector with DOI capability for a small animal PET

Seung Jae Lee, Cheol Ha Baek, Yong Hyun Chung, Yong Choi, Wonho Lee

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


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).

Original languageEnglish
Pages (from-to)2429-2434
Number of pages6
JournalJournal of the Korean Physical Society
Issue number6
Publication statusPublished - 2009 Jun


  • Depth of interaction
  • Maximum-likelihood position estimating
  • Monolithic crystal
  • PET

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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