Translator Disclaimer
19 March 2007 Fast variance predictions for 3D cone-beam CT with quadratic regularization
Author Affiliations +
Fast and accurate variance/covariance predictions are useful for analyzing the statistical characteristics of the reconstructed images and may aid regularization parameters selection. The existing methods, the matrix-based method and its DFT approximations, are impractical for realistic data size in X-ray CT. We have previously addressed this problem in 2D fan-beam CT by proposing "analytical" approaches, the simplest of which requires computation equivalent to one backprojection and some summations. This paper extends these approaches to 3D step-and-shoot "cylindrical" cone-beam CT.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yingying Zhang-O'Connor and Jeffrey A. Fessler "Fast variance predictions for 3D cone-beam CT with quadratic regularization", Proc. SPIE 6510, Medical Imaging 2007: Physics of Medical Imaging, 65105W (19 March 2007);

Back to Top