Local-Limited-Angle CT image reconstruction based on wavelet and Radon domain inpainting

X-ray computed tomography (CT) has been playing an important role in diagnostic and industrial fields. However, high imaging dose is harmful to healthy organs. In this paper, a local Reconstruction method based on wavelet and Radon domain inpainting is proposed to recover a small region of interest...

Full description

Saved in:
Bibliographic Details
Published in2012 IEEE 11th International Conference on Signal Processing Vol. 1; pp. 761 - 764
Main Authors Kejun Wang, Huizhu Ma
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2012
Subjects
computed tomography
Radon domain
ROI
total variation
wavelet
Online AccessGet full text

Cover

More Information
Summary:X-ray computed tomography (CT) has been playing an important role in diagnostic and industrial fields. However, high imaging dose is harmful to healthy organs. In this paper, a local Reconstruction method based on wavelet and Radon domain inpainting is proposed to recover a small region of interest (ROI) inside a large object only using the Local-Limited-Angle projections. Our method is motivated by the localization in time-frequency domain of wavelet transform and the minimization of the image total variation (TV). The proposed model enhances the resolution of the CT image with filling wavelet coefficients in the Radon domain. Numerical demonstrations of our algorithm are performed with various insufficient parallel beam projections.
ISBN:9781467321969
1467321966
ISSN:2164-5221
DOI:10.1109/ICoSP.2012.6491599