Tomographic image reconstruction from limited-view projections with Wiener filtered focuss algorithm | IEEE Conference Publication | IEEE Xplore

Tomographic image reconstruction from limited-view projections with Wiener filtered focuss algorithm


Abstract:

In tomographic image reconstruction from limited-view projections the underlying inverse problem is ill-posed with the rank-deficient system matrix. The minimal-norm leas...Show More

Abstract:

In tomographic image reconstruction from limited-view projections the underlying inverse problem is ill-posed with the rank-deficient system matrix. The minimal-norm least squares solution may considerably differs from the true solution, and hence a priori knowledge is needed to improve the reconstruction. In our approach, we assume that the true image presents sparse features with uniform spacial smoothness. The sparsity constraints are imposed with the ℓp diversity measure that is minimized with the FOCUSS algorithm. The spacial smoothness is enforced with the adaptive Wiener noise removing implemented in each FOCUSS iterations. The simulation results demonstrate the benefits of the proposed approach.
Date of Conference: 14-17 May 2008
Date Added to IEEE Xplore: 13 June 2008
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Conference Location: Paris, France

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