Volumetric restoration of tuned-aperture computed tomography

Paul F. Hemler; Timothy M. Persons; Robert J. Plemmons

doi:10.1117/12.479984

5 June 2003 Volumetric restoration of tuned-aperture computed tomography

Paul F. Hemler, Timothy M. Persons, Robert J. Plemmons

Proceedings Volume 5030, Medical Imaging 2003: Physics of Medical Imaging; (2003) https://doi.org/10.1117/12.479984
Event: Medical Imaging 2003, 2003, San Diego, California, United States

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.

Citation Download Citation

Paul F. Hemler, Timothy M. Persons, and Robert J. Plemmons "Volumetric restoration of tuned-aperture computed tomography", Proc. SPIE 5030, Medical Imaging 2003: Physics of Medical Imaging, (5 June 2003); https://doi.org/10.1117/12.479984

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