现代科学仪器Issue(2)：7-11,5.
注入电流式热声成像方法研究
Study of Thermo-acoustic Imaging with Current Injection
摘要
Abstract
Thermoacoustic Imaging is multi-field coupling imaging technology that combines the electromagnetic field and sound field.Thermoacoustic Imaging is a medical functional imaging technology combining the advantages of high contrast of the electrical impedance tomography with the high spatial resolution of sonography,it can realize early detection and diagnosis of human diseases.Thermo-acoustic imaging with current injection(TAI-CI) was mainly studied in this paper,the principle of TAI-CI was studied,forward problem and inverse problem for TAI-CI basing electrical and thermal/acoustic coupling were derived,the equations and boundary conditions of target were obtained at electric quasi static approximation condition.The time reversal algorithm was used to process the detected signals and reconstruct the acoustic sources,simulation and experimental were carried out aiming at low conductivity phantom,an experiment set on TAI-CI was established to detect and collect the acoustic signals from the gel phantom,the acoustic source distribution of the gel phantom was reconstructed.Those revealed that TAI-CI can effectively reconstruct acoustic source images and reflect the conductivity distribution of the model.The results verified the feasibility of electrical parameter imaging using TAI-CI.关键词
热声成像/声源重建/注入电流/低电导率Key words
Thermo-acoustic imaging/Reconstruction of acoustic source/Current injection/low Conductivity分类
医药卫生引用本文复制引用
李艳红,刘国强,杨延菊,夏正武..注入电流式热声成像方法研究[J].现代科学仪器,2017,(2):7-11,5.基金项目
国家自然科学基金(51477161),国家自然科学基金(51407175). （51477161）
