Perez-Liva, M;
Herraiz, JL;
Medina-Valdes, L;
Camacho, J;
Fritsch, C;
Treeby, BE;
Udias, JM;
(2016)
Regularization of image reconstruction in ultrasound computed tomography.
In:
2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC).
(pp. pp. 1-3).
IEEE
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Abstract
We propose two regularizations techniques for a bent-ray (BR) tracing algorithm to reconstruct the speed of sound maps of breast tissues in an Ultrasound Computed Tomography (USCT) system. When high frequencies are employed, the use of BR is a good approximation to describe the propagation of the front of the pressure wave. The quantitative accuracy of the images reconstructed with the BR algorithm was evaluated without any kind of regularization, and with two regularization methods. The regularizations were based on some available a priori information, namely the known higher and lower values of the speed of sound expected in the breast tissues, and the maps of the internal structures obtained from the standard reflection ultrasound (US) imaging. The use of the proposed regularizations in the implemented algorithm improves the convergence and quality of the resulting images, although further improvements are still possible. These methods will help obtaining quantitative US images in a reasonable amount of time, expanding the possibilities and applications of this technique.
| Type: | Proceedings paper |
|---|---|
| Title: | Regularization of image reconstruction in ultrasound computed tomography |
| Event: | 2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) - 22nd International Symposium on Room-Temperature Semi-Conductor X-Ray and Gamma-ray Detectors |
| Location: | San Diego, California, USA |
| Dates: | 31 November 2015 - 7 December 2015 |
| ISBN-13: | 9781467398626 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/NSSMIC.2015.7582217 |
| Publisher version: | http://ieeexplore.ieee.org/document/7582217/ |
| Language: | English |
| Additional information: | © 2015 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: | Tumours, biomedical ultrasonics, cancer, computerised tomography, image reconstruction, medical image processing, pressure wave, regularization, image reconstruction, ultrasound computed tomography, bent-ray tracing algorithm, sound maps, breast tissues, USCT system |
| 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/1529179 |
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