Perez-Liva, M;
Herraiz, JL;
Udias, JM;
Cox, BT;
Treeby, BE;
(2016)
Full-wave attenuation reconstruction in the time domain for ultrasound computed tomography.
In:
2016 IEEE 13th International Symposium on Biomedical Imaging (ISBI): From Nano to Macro, ISBI 2016 - Proceedings.
(pp. pp. 710-713).
IEEE
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Abstract
Acoustical attenuation (AA) maps in Ultrasound Computed Tomography (USCT) provide enhanced contrast between tissues compared to the speed of sound (SS), which is the most common property of tissue studied with this technique. Currently, the full wave inversion (FWI) methods used for their reconstruction are very different: the AA is mainly estimated using frequency domain algorithms, while the SS is more often recovered in the time domain. In this work we present a novel strategy to recover the attenuation maps through a straightforward and simplified procedure in the time domain. A gradient descent method was employed to optimize iteratively the attenuation distribution. The expression for the functional gradient of the norm of the global deviation between experimental and simulated data was obtained using an adjoint method. The optimization code, implemented in C++, employs a CUDA version of the k-Wave software to perform forward and backward wave propagation. Noisy simulated data was used to test the performance of the proposed method. The simplicity of the formulation of this new method may facilitate the reconstruction of AA and SS maps under a common framework in USCT.
| Type: | Proceedings paper |
|---|---|
| Title: | Full-wave attenuation reconstruction in the time domain for ultrasound computed tomography |
| Event: | 2016 IEEE 13th International Symposium on Biomedical Imaging (ISBI 2016) |
| Location: | Prague, Czech Republic |
| Dates: | 13 April 2016 - 16 April 2016 |
| ISBN: | 9781479923496 |
| ISBN-13: | 9781479923502 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/ISBI.2016.7493365 |
| Publisher version: | http://ieeexplore.ieee.org/document/7493365/ |
| Language: | English |
| Additional information: | © 2016 IEEE.Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. |
| Keywords: | Image reconstruction, Attenuation, Ultrasonic imaging, Absorption, Time-domain analysis, Imaging, gradient-descent, USCT, attenuation maps, full-wave inversion, adjoint method |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1512510 |
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