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Influence of dual-frequency combination on the quality improvement of ultrasound tomography

Tran, Quang Huy and Tran, Duc Tan and Huynh, Huu Tue and Ton, That Long and Nguyen, Linh Trung (2016) Influence of dual-frequency combination on the quality improvement of ultrasound tomography. Simulation: Transactions of The Society for Modeling and Simulation International, 92 (3). pp. 267-276. ISSN 1741-3133

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The most useful feature of ultrasound tomography founded on the inverse scattering theory is that it can detect small structures below the wavelength of the pressure wave. A popular method introduced in ultrasound tomography is the Distorted Born Iterative Method (DBIM). Recently, the dual-frequency combination technique has been utilized to improve the reconstruction quality and increase the convergence rate of the DBIM. This method uses two frequencies, f_1 (low) and f_2 (high), to estimate the sound contrast in N_f1 and N_f2 iterations, respectively. However, the influence of these iteration parameters on the overall performance of the system is not yet known. In this paper, it is shown by using the simulation technique that if we do not pay attention to the choice of these parameters, the reconstruction quality might be worse than that using a single frequency. Furthermore, we focus on the best way to select the parameters in order to improve the reconstruction quality of ultrasound tomography. Given a fixed sum N iter of N_f1 and N_f2 , simulation results show that the best value of N_f1 is N_iter/2; this choice of parameters offers a normalized error that reduces by 67.6%, compared to the conventional DBIM using a single frequency.

Item Type: Article
Subjects: Electronics and Communications
ISI-indexed journals
Divisions: Faculty of Electronics and Telecommunications (FET)
Depositing User: A/Prof. Linh Trung Nguyen
Date Deposited: 08 Dec 2016 16:57
Last Modified: 08 Dec 2016 16:59

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