Novel SPECT collimation system and related reconstruction algorithm

Zong Jian Cao, Benjamin M.W. Tsui

Research output: Contribution to conferencePaperpeer-review


A novel collimation system for SPECT was proposed which consists of a series of parallel-hole collimators with different collimation angles, ranging from a small angle representing a conventional high resolution collimator to 90° for no collimation. A 2D reconstruction algorithm for the collimation system was derived. In the algorithm, projection data from different collimators were combined to compute line integrals with various orientations and then the series of line integrals were filtered, backprojected and summed to form the reconstructed image. Simulation studies show that the new collimation provides much increased detection efficiency with the same spatial resolution as compared to a conventional collimator. This is because the efficiency is determined by the collimators with large collimation angles and the resolution is determined by the smallest collimation angle and the number of collimators.

Original languageEnglish (US)
Number of pages4
StatePublished - 1995
EventProceedings of the 1994 Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 4) - Norfolk, VA, USA
Duration: Oct 30 1994Nov 5 1994


OtherProceedings of the 1994 Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 4)
CityNorfolk, VA, USA

ASJC Scopus subject areas

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

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