An Efficient Procedure of Multi-frequency Use for Image Reconstruction in Ultrasound Tomography

摘要

Distorted Born iterative method (DBIM) using multi-frequency information has been studied and applied in ultrasound tomography. However, the use of different frequencies in different iterations in the DBIM method is not used consistently. The value of the frequency hopping step is often chosen depending on the simulation builder or experimenter. Based on the multi-frequency combination technique, this paper suggests an effective multi-frequency combination procedure to improve the quality of reconstructing ultrasound images using fundamental tone and overtones (FTaOT). The numerical simulation results show that the normalized error of the suggested scheme is decreased by 45% in comparison with the dual-frequency method. Other multi-frequency combination scenarios are also simulated to demonstrate the feasibility of the proposed method.