These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Wavelet-based reconstruction for limited-angle X-ray tomography.
    Author: Rantala M, Vänskä S, Järvenpää S, Kalke M, Lassas M, Moberg J, Siltanen S.
    Journal: IEEE Trans Med Imaging; 2006 Feb; 25(2):210-7. PubMed ID: 16468455.
    Abstract:
    The aim of X-ray tomography is to reconstruct an unknown physical body from a collection of projection images. When the projection images are only available from a limited angle of view, the reconstruction problem is a severely ill-posed inverse problem. Statistical inversion allows stable solution of the limited-angle tomography problem by complementing the measurement data by a priori information. In this work, the unknown attenuation distribution inside the body is represented as a wavelet expansion, and a Besov space prior distribution together with positivity constraint is used. The wavelet expansion is thresholded before reconstruction to reduce the dimension of the computational problem. Feasibility of the method is demonstrated by numerical examples using in vitro data from mammography and dental radiology.
    [Abstract] [Full Text] [Related] [New Search]