Tomographic small-animal imaging using a high-resolution semiconductor camera

George A. Kastis, Max C. Wu, Steve J. Balzer, Donald W. Wilson, Lars R. Furenlid, Gail Stevenson, H. Bradford Barber, Harrison H. Barrett, James M. Woolfenden, Patrick Kelly, Michael Appleby

Research output: Contribution to journalArticlepeer-review

41 Scopus citations


We have developed a high-resolution, compact semiconductor camera for nuclear medicine applications. The modular unit has been used to obtain tomographic images of phantoms and mice. The system consists of a 64 × 64 CdZnTe detector array and a parallel-hole tungsten collimator mounted inside a 17 cm × 5.3 cm × 3.7 cm tungsten-aluminum housing. The detector is a 2.5 cm × 2.5 cm × 0.15 cm slab of CdZnTe connected to a 64 × 64 multiplexer readout via indium-bump bonding. The collimator is 7-mm thick, with a 0.38-mm pitch that matches the detector pixel pitch. We obtained a series of projections by rotating the object in front of the camera. The axis of rotation was vertical and about 1.5 cm away from the collimator face. Mouse holders were made out of acrylic plastic tubing to facilitate rotation and the administration of gas anesthetic. Acquisition times were varied from 60 to 90 s per image for a total of 60 projections at an equal spacing of 6° between projections. We present tomographic images of a line phantom and mouse bone scan and assess the properties of the system. The reconstructed images demonstrate spatial resolution on the order of 1 to 2 mm.

Original languageEnglish (US)
Pages (from-to)172-175
Number of pages4
JournalIEEE Transactions on Nuclear Science
Issue number1 I
StatePublished - Feb 2002


  • Biomedical imaging
  • Cadmium zinc telluride (CdZnTe)
  • Single photon emission computed tomography
  • Small-animal imaging

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Electrical and Electronic Engineering


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