A prototype low-energy, multi-pinhole SPECT system for small-animal imaging

Todd E. Peterson, Donald W. Wilson, Harrison H. Barrett

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


Small-animal nuclear imaging applications require both good spatial resolution and good sensitivity. The use of a detector with outstanding spatial resolution allows high-resolution pinhole imaging to be done with only modest magnification. Consequently, multi-pinhole imaging can be done with significantly reduced multiplexing compared to what would be encountered at an equivalent spatial resolution using a conventional scintillator-based system. We present tomographic images obtained with our prototype silicon imaging system. The silicon detector is a double-sided strip detector of 300 micrometer thickness and 50 micrometer strip pitch with an active area of 28mm × 63mm. The imaging aperture is a multiple-pinhole collimator made from molybdenum. This system is suitable for imaging the low-energy emissions (27-35 keV) from the decay of iodine-125. We present plans for a next-generation silicon-based imaging system that will significantly improve the sensitivity.

Original languageEnglish (US)
Pages (from-to)2999-3002
Number of pages4
JournalIEEE Nuclear Science Symposium Conference Record
StatePublished - 2004
Event2004 Nuclear Science Symposium, Medical Imaging Conference, Symposium on Nuclear Power Systems and the 14th International Workshop on Room Temperature Semiconductor X- and Gamma- Ray Detectors - Rome, Italy
Duration: Oct 16 2004Oct 22 2004

ASJC Scopus subject areas

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


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