Accession Number:

ADA409763

Title:

Regularization in Tomographic Reconstruction Using Thresholding Estimators

Descriptive Note:

Conference paper

Corporate Author:

COLUMBIA-PRESBYTERIAN MEDICAL CENTER NEW YORK

Report Date:

2001-10-25

Pagination or Media Count:

5.0

Abstract:

In tomographic medical devices such as SPECT or PET cameras image reconstruction is an unstable inverse problem due to the presence of additive noise. A new family of regularization methods for reconstruction based on a thresholding procedure in wavelet and wavelet packet decompositions is studied. This approach is based on the fact that the decompositions provide a near-diagonalization of the inverse Radon transform and of the prior information on medical images. Corresponding algorithms have been developed for both 2-D and full 3-D reconstruction. These procedures are fast, non-iterative, flexible and their performances outperform Filtered Back-Projection and iterative procedures such as OS-EM.

Subject Categories:

  • Medicine and Medical Research
  • Numerical Mathematics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE