Abstract

Info

Title:: Vibro-acoustography based on large-angle dual-frequency focused transducer

Author(s):: CAO Linna1; LUO Jieyu1; QUETAI Jiangchu1; ZHOU Xiaowei1; 2; LI Yanhao1; 2; 1. State Key Laboratory of Ultrasonic Medical Engineering/College of Biomedical Engineering, Chongqing Medical University, Chongqing 400016, China 2. National Engineering Research Center of Ultrasonic Medicine, Chongqing 401121, China

Keywords:: Keywords: large-angle dual-frequency focused transducer ultrasound stimulated acoustic emission vibro-acoustography spatial resolution focused ultrasound

Abstract:: Abstract: To enhance the spatial resolution of vibro-acoustography, an improved vibro-acoustography system is constructed using a large-angle dual-frequency focused transducer. Based on this system, mimicking phantoms are used as the experimental objects to explore the spatial resolution of vibro-acoustography, and test the vibro-acoustography results of mimicking phantoms with different acoustic characteristics. Additionally, the effects of the position of hydrophone and difference frequency on the vibro-acoustography results are studied, and the effects of transducer component distribution on vibro-acoustography results are analyzed with a simulation model established with k-Wave. The research results indicate that the vibro-acoustography system with a large-angle dual-frequency focused transducer has higher spatial resolution, contrast and specificity in imaging mimicking phantoms with different acoustic characteristics. The choice of difference frequency is critical for the imaging quality, but the position of the hydrophone and transducer component distribution have trivial effects on vibro-acoustography results. The study is expected to provide new ideas for the development of vibro-acoustography technology, and to promote its further practical application.