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Proceedings Paper

Volumetric restoration of tuned-aperture computed tomography
Author(s): Paul F. Hemler; Timothy M. Persons; Robert J. Plemmons
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Paper Abstract

Analytic determination of the 3D PSF of a tomosynthetic image volume allows us to solve the ill-posed inverse problem of recovering an image volume from a nonspecific orientation of projection views. To restore these inherently blurred images from tuned-aperture reconstructed volumes, we consider three approaches; direct inversion via 3D Wiener filter restoration, regularized iterative 3D conjugate gradient least squares, and regularized nonlinear iterative 3D modified residual norm steepest descent with nonnegativity constraints. From these tests we infer that all three methods produce adequate restorations, while the nonlinear, nonnegatively constrained iterative algorithm appears to produce especially good restorations for this problem in an efficient and stable way.

Paper Details

Date Published: 5 June 2003
PDF: 10 pages
Proc. SPIE 5030, Medical Imaging 2003: Physics of Medical Imaging, (5 June 2003); doi: 10.1117/12.479984
Show Author Affiliations
Paul F. Hemler, Wake Forest Univ. School of Medicine (United States)
Timothy M. Persons, Wake Forest Univ. (United States)
Robert J. Plemmons, Wake Forest Univ. (United States)

Published in SPIE Proceedings Vol. 5030:
Medical Imaging 2003: Physics of Medical Imaging
Martin J. Yaffe; Larry E. Antonuk, Editor(s)

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