南京师范大学学报（工程技术版）2024，Vol.24Issue(2)：20-27,49,9.DOI:10.3969/j.issn.1672-1292.2024.02.003
聚焦换能器声场特性的快速检验方法
A Fast Field Testing Method for Focused Transducer
摘要
Abstract
The high intensity focused ultrasound(HIFU)has shown great applied potential in non-invasive tumor treatment,and the focusing performance of the transducer plays a crucial role in the therapeutic effect.Hence,the accurate measurement of the focused acoustic field shows great significance to guarantee treatment accuracy of practical HIFU therapy.However,due to the limitation of fabrication technology and installation accuracy,some difference between the actual and ideal field of the focused transducer may be produced.In this paper,to solve the low-speed and low-accuracy of the traditional three-dimensional scanning,a rapid inspection method for focused acoustic field is proposed on the basis of the dual-precision measurement in double planes.The inclination angle range of the transducer is first determined by the extreme point in the focal distance based on the high-precision one-dimensional scanning along the ideal axis.And then,the pressure-peak position is accurately located in the cross section by applying the variable neighborhood search algorithm in both low and high precisions.The actual beam axis is further constructed by the pressure-peak points in double planes within the focal region,and the precise location of the focus is achieved.Finally,based on the high-precision axial and radial measurements in the actual focal plane,the performance parameters such as the focal field size,side lobe level,field symmetry and acoustic power are obtained.Compared with the experimental three-dimensional measurements,the measurement efficiency can be greatly enhanced by the proposed fast inspection method by over 100 times,with the advantages of high speed,flexible accuracy and comprehensive performance analysis.This study provides a new high-precision fast measurement technology for focused transducers,and exhibits prosperous perspectives in the inspection of ultrasonic therapeutic instruments.关键词
聚焦换能器声场/双平面双精度测量/变邻域搜索法/性能参数Key words
acoustic field of focused transducer/dual-precision measurement in double planes/variable neighborhood search algorithm/performance parameter分类
通用工业技术引用本文复制引用
马蕊生,李文溢,胡济民,李禹志,郭各朴,马青玉..聚焦换能器声场特性的快速检验方法[J].南京师范大学学报（工程技术版）,2024,24(2):20-27,49,9.基金项目
国家自然科学基金项目(11934009、11974187、12174198、12227808)、江苏省自然科学基金项目(BE2022814). （11934009、11974187、12174198、12227808）
