TY - GEN
T1 - Constrained total variation minimization for photoacoustic tomography
AU - Salehin, S. M.Akramus
AU - Abhayapala, Thushara D.
PY - 2012
Y1 - 2012
N2 - 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 l 2 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.
AB - 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 l 2 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.
KW - Fourier Bessel series
KW - Projected subgradient
KW - Thermoacoustic
KW - Tomography
UR - http://www.scopus.com/inward/record.url?scp=84867615422&partnerID=8YFLogxK
U2 - 10.1109/ICASSP.2012.6287941
DO - 10.1109/ICASSP.2012.6287941
M3 - Conference contribution
SN - 9781467300469
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 561
EP - 564
BT - 2012 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2012 - Proceedings
T2 - 2012 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2012
Y2 - 25 March 2012 through 30 March 2012
ER -