A gamma ray imager using clustered non-redundant array coded aperture

L. J. Meng, D. K. Wehe

Research output: Contribution to journalConference articlepeer-review


This paper presents the design and initial experimental results of a gamma camera using a coded aperture with clustered non-redundant array pattern. This system is based on the use of 5" position sensitive photomultiplier tube coupled to pixelated BGO array with 2×2×10mm 3 pixels. The PSPMT is readout by the IDEAS VA-MCR system with a costume made front electronic. This gamma camera was designed for imaging gamma rays with a broad energy range. The collimator plate was made of Tungsten of 8mm thick for reducing the effect of gamma ray penetration. For imaging source objects with a relatively large angular extent and high background, the use of clustered NRA offers great flexibility in aperture design that provides a wide view angle and a controlled data multiplexing. In order to replace the time consuming Monte Carlo simulations, we also presented an analytical method for calculating performance indices, such as pixel-wise signal-to-noise ratio and resolution/variance tradeoffs achievable with different detector designs. This helps to select an approximate aperture for given imaging tasks.

Original languageEnglish (US)
Article numberN26-73
Pages (from-to)763-766
Number of pages4
JournalIEEE Nuclear Science Symposium Conference Record
StatePublished - 2003
Externally publishedYes
Event2003 IEEE Nuclear Science Symposium Conference Record - Nuclear Science Symposium, Medical Imaging Conference - Portland, OR, United States
Duration: Oct 19 2003Oct 25 2003


  • Clustered non-redundant array
  • Coded aperture

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Radiology Nuclear Medicine and imaging


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