Uniformly redundant array coded apertures have proven to be useful in the design of collimators for x-ray astronomy. They were initially expected to be equally successful in single-photon emission computed tomography (SPECT). Unfortunately, the SPECT images produced by this collimator contain artifacts, which mask the true picture and can lead to false diagnosis. Monte Carlo simulation has shown that the formation of a composite image will significantly reduce these artifacts. A simulation of a tumor in a compressed breast phantom has produced a composite image, which clearly indicates the presence of a 5 mm × 5 mm × 5 mm tumor with a 6:1 intensity ratio relative to the background tissue.
© 2002 Optical Society of America
(100.6950) Image processing : Tomographic image processing
(170.0110) Medical optics and biotechnology : Imaging systems
(170.1630) Medical optics and biotechnology : Coded aperture imaging
(170.6960) Medical optics and biotechnology : Tomography
Olga I. Vassilieva and Roy C. Chaney, "Method for Reducing Background Artifacts from Images in Single-Photon Emission Computed Tomography with a Uniformly Redundant Array Coded Aperture," Appl. Opt. 41, 1454-1461 (2002)