Vibro-acoustography based on large-angle dual-frequency focused transducer
10.3969/j.issn.1005-202X.2024.05.005
- VernacularTitle:基于大张角双频聚焦换能器的振动声成像
- Author:
Linna CAO
1
;
Jieyu LUO
;
Jiangchu QUETAI
;
Xiaowei ZHOU
;
Yanhao LI
Author Information
1. 重庆医科大学生物医学工程学院/超声医学工程国家重点实验室,重庆 400016
- Keywords:
large-angle dual-frequency focused transducer;
ultrasound stimulated acoustic emission;
vibro-acoustography;
spatial resolution;
focused ultrasound
- From:
Chinese Journal of Medical Physics
2024;41(5):554-562
- CountryChina
- Language:Chinese
-
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.
