Abstract Based on magnetic resonance images, a method for analyzing the acoustic characteristics of multilayer media was proposed, and the focal point of ultrasound passing through the layered structure was estimated.Firstly, after performing edge extraction such as region extraction, threshold segmentation, corrosion expansion on the magnetic resonance T1-weighted image of the sucrose solution, the average gray value of the local region was obtained.Then, the relationship function was calculated by calculating the relationship between the grayscale information on the magnetic resonance image and the concentration and sound velocity of the corresponding sucrose solution.Finally, a layered structure of sucrose solution that simulates biological tissues was established, and the relationship function was used to calculate the acoustic transmission of ultrasound through the layered structure and the focus forward movement of focused ultrasound.The experimental results show that the method analyzes the sound velocity, acoustic transmission coefficient and focus advance from the sucrose solution magnetic resonance image, compared with the actual value obtained by the experiment, the maximum difference is 0.6239mm, it is verified the possibility of acquiring biological tissue acoustic parameters can through magnetic resonance.
ZHU Qin-feng,ZHENG Hui-feng,WANG Yue-bing, et al. Acoustic Characteristics Analysis of Multilayer Media Based on Magnetic Resonance Imaging[J]. Acta Metrologica Sinica, 2020, 41(9): 1102-1108.
2020, Vol. 41 
