Time domain reconstruction of sound speed and attenuation in ultrasound computed tomography using full wave inversion

被引:96
作者
Perez-Liva, M. [1 ]
Herraiz, J. L. [1 ]
Udias, J. M. [1 ]
Miller, E. [2 ]
Cox, B. T. [3 ]
Treeby, B. E. [3 ]
机构
[1] Univ Complutense Madrid, Dept Fis Atom Mol & Nucl, Grp Fis Nucl, Fac Ciencias Fisicas, Campus Excelencia Int Moncloa,Ave Complutense S-N, E-28040 Madrid, Spain
[2] Tufts Univ, Dept Elect & Comp Engn, 161 Coll Ave, Medford, MA 02155 USA
[3] UCL, Dept Med Phys & Biomed Engn, Gower St, London WC1E 6BT, England
基金
英国工程与自然科学研究理事会;
关键词
POWER-LAW ABSORPTION; FORM INVERSION; BREAST; SCATTERING; PROPAGATION; DIFFRACTION; DISPERSION; MEDIA; NOISE;
D O I
10.1121/1.4976688
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
Ultrasound computed tomography (USCT) is a non-invasive imaging technique that provides information about the acoustic properties of soft tissues in the body, such as the speed of sound (SS) and acoustic attenuation (AA). Knowledge of these properties can improve the discrimination between benign and malignant masses, especially in breast cancer studies. Full wave inversion (FWI) methods for image reconstruction in USCT provide the best image quality compared to more approximate methods. Using FWI, the SS is usually recovered in the time domain, and the AA is usually recovered in the frequency domain. Nevertheless, as both properties can be obtained from the same data, it is desirable to have a common framework to reconstruct both distributions. In this work, an algorithm is proposed to reconstruct both the SS and AA distributions using a time domain FWI methodology based on the fractional Laplacian wave equation, an adjoint field formulation, and a gradient-descent method. The optimization code employs a Compute Unified Device Architecture version of the software kappa-Wave, which provides high computational efficiency. The performance of the method was evaluated using simulated noisy data from numerical breast phantoms. Errors were less than 0.5% in the recovered SS and 10% in the AA. (C) 2017 Acoustical Society of America.
引用
收藏
页码:1595 / 1604
页数:10
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