Noniterative inversion strategy for photoacoustic tomography: recovery of absorbed energy map from boundary pressure measurements

Bagchi, Srijeeta and Banerjee, Biswanath and Vasu, Ram Mohan and Roy, Debasish (2011) Noniterative inversion strategy for photoacoustic tomography: recovery of absorbed energy map from boundary pressure measurements. In: 2011 IEEE 37th Annual Northeast Bioengineering Conference (NEBEC), 1-3 April 2011, Troy, NY.

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Abstract

The inverse problem in photoacoustic tomography (PAT) seeks to obtain the absorbed energy map from the boundary pressure measurements for which computationally intensive iterative algorithms exist. The computational challenge is heightened when the reconstruction is done using boundary data split into its frequency spectrum to improve source localization and conditioning of the inverse problem. The key idea of this work is to modify the update equation wherein the Jacobian and the perturbation in data are summed over all wave numbers, k, and inverted only once to recover the absorbed energy map. This leads to a considerable reduction in the overall computation time. The results obtained using simulated data, demonstrates the efficiency of the proposed scheme without compromising the accuracy of reconstruction.

Item Type:	Conference Proceedings
Publisher:	IEEE
Additional Information:	Copyright of this article belongs to IEEE.
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	01 May 2013 10:26
Last Modified:	01 May 2013 10:26
URI:	http://eprints.iisc.ac.in/id/eprint/46275

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