SemiSPECT: A Small-animal Imaging System Based on Eight CdZnTe Pixel Detectors

Todd E. Peterson, Hyunki Kim, Michael J. Crawford, Benjamin M. Gershman, William C.J. Hunter, H. Bradford Barber, Lars R. Furenlid, Donald W. Wilson, James M. Woolfenden, Harrison H. Barrett

Research output: Contribution to conferencePaperpeer-review

22 Scopus citations


We have constructed a SPECT system for small animals that utilizes eight CdZnTe pixel detectors. The eight detectors are arranged in a single octagonal ring, where each views the object to be imaged through a single pinhole. Additional projections are obtained via rotation of the animal. Each CdZnTe detector is approximately 2 mm in thickness and is patterned on one surface into a 64×64 array of pixels with 380 micron pitch. We have designed an electronic readout system capable of collecting data from the eight detectors in listmode. In this scheme each event entry for a gamma-ray hit includes the pulse height of the pixel with the largest signal and the pulse height for each of its eight nearest neighbors. We present details of the overall design, the electronics, and system performance.

Original languageEnglish (US)
Number of pages4
StatePublished - 2002
Event2002 IEEE Nuclear Science Symposium Conference Record - Norfolk, VA, United States
Duration: Nov 10 2002Nov 16 2002


Other2002 IEEE Nuclear Science Symposium Conference Record
Country/TerritoryUnited States
CityNorfolk, VA


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

ASJC Scopus subject areas

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


Dive into the research topics of 'SemiSPECT: A Small-animal Imaging System Based on Eight CdZnTe Pixel Detectors'. Together they form a unique fingerprint.

Cite this