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Constrained total variation minimization for photoacoustic tomography

Date

2012

Authors

Salehin, S.M.Akramus
Abhayapala, Thushara

Journal Title

Journal ISSN

Volume Title

Publisher

IEEE Signal Processing Society

Abstract

Similar to computed tomography, the images from photoacoustic tomography are piecewise smooth and reconstructions can be enhanced by applying Total Variation (TV) minimization. Also, the photoacoustic image must satisfy both the data fidelity and a non negativity constraint. This paper proposes a constrained TV minimization formulation in the Fourier Bessel domain which has the advantage of reducing the dimension of the fidelity constraint and the projection onto this constraint can be performed by a simple projection onto the l2 ball. The TV minimization post processing improves the quality of images reconstructed and recovers the lost, low frequency information when sensor lower frequency limit is higher than zero.

Description

Keywords

Keywords: Computed Tomography; Data fidelity; Fourier; Fourier-Bessel series; Low frequency; Lower frequencies; Non-negativity; Photoacoustic image; Photoacoustic tomography; Piecewise smooth; Post processing; Subgradient; Thermoacoustic; Total variation; Total var Fourier Bessel series; Projected subgradient; Thermoacoustic; Tomography

Citation

Source

Type

Conference paper

Book Title

Entity type

Access Statement

License Rights

DOI

10.1109/ICASSP.2012.6287941

Restricted until

2037-12-31