摘要
新冠肺炎可引起肺水肿和肺实变,对肺部造成严重的损害。CT检测存在辐射,超声成像对轻症患者难以发挥作用。磁声电成像是一种典型的电磁和超声相互耦合的电特性成像技术,具有高空间分辨率和高对比度的优点,可检测肺部病变早期变化。该文介绍磁声电技术的原理,利用有限元分析软件建立肺水肿或肺实变前期模型和完全肺水肿或肺实变模型,仿真分析所建模型的磁声电信号并实现了B扫成像。仿真结果表明,肺部组织内的气体对超声波有反射作用,随着肺部组织内气体含量逐渐减少,肺部组织左边界上由反射超声波形成的脉冲信号幅值减小,肺部组织右边界上由绕射过含气组织的超声波增加产生的脉冲信号幅值增大。当肺部完全水肿或肺实变后,肺部组织内不再含有气体,由反射超声波引起的脉冲信号消失,可显示内部肿块的脉冲信号。该文通过仿真论述了磁声电成像技术在新冠肺炎临床应用中的潜力。
COVID-19 can cause pulmonary edema and pulmonary consolidation,causing serious damage to the lungs.CT is radioactive,and ultrasound imaging is difficult to play a role in patients with mild symptoms.Magneto-acousto-electrical tomography(MAET)is a typical electrical characteristic imaging technology that couples electromagnetic field and ultrasound.It has the advantages of high spatial resolution and high contrast,and can detect early-stage of lung lesions.In this paper,the principle of MAET is introduced,and the pre-pulmonary edema or pre-consolidation model and complete pulmonary edema or pulmonary consolidation model are established through finite element software.The MAET signal of the model is analyzed,and the B-scan imaging is realized.The simulation results show that the gas in the lung tissue has a reflection effect on ultrasound.As the gas content in the lung tissue decreases,the amplitude of the pulse signal formed by the reflected ultrasound on the left boundary of the lung tissue gradually decreases,while on the right boundary of lung tissue,the amplitude of pulse signal generated by the increase of ultrasonic diffraction through gassed tissue increases.When the lungs are completely edema or consolidation,the lung tissue no longer contains gas,the pulse signal caused by reflected ultrasound disappears,and pulse signal of internal mass can be displayed.The potential of MAET is discussed in the clinical application of COVID-19 through simulation.
作者
李彩莲
李元园
刘国强
Li Cailian;Li Yuanyuan;Liu Guoqiang(Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China;School of Electronic Electrical and Communication Engineering,University of Chinese Academy of Sciences,Beijing 100190,China)
出处
《电工技术学报》
EI
CSCD
北大核心
2021年第4期732-737,共6页
Transactions of China Electrotechnical Society
基金
国家自然科学基金资助项目(51937010)。
关键词
新冠肺炎肺水肿
肺实变
磁声电成像
B扫图像
COVID-19
pulmonary edema
pulmonary consolidation
magneto-acousto-electrical tomography
B scan image
