【摘要】 磁感应磁声成像技术是一种将电磁场、声场相互耦合进行电导率参数成像的方法,具有电阻抗成像技术高对比度和超声成像技术高分辨率的优点,是一种新型的组织电特性参数功能成像方法。本文介绍该成像技术的基本原理,对放在一恒强磁场中的生物组织施加脉冲磁场,生物组织中便有感应电流与洛伦兹力产生,于是生物组织发出声波,利用声波即可重建出组织的电导率分布图像。虽然磁感应磁声成像技术的研究取得了一定成绩,但还有许多理论和实验方面的内容亟待解决,仍处于初级研究阶段,同时指出了磁感应磁声成像技术研究面临的诸多挑战。更多还原

【Abstract】 Magnetoacoustic tomography with magnetic induction(MAT-MI) is an imaging modality that couples the electromagnetic field and acoustic field for electric conductivity imaging and combines the advantages of high contrast of electrical impedance tomography and high resolution of ultrasound imaging.MAT-MI is a new functional imaging method based on tissuespecific electrical parameters.In MAT-MI,the pulsed magnetic field is applied to the biological tissue in a static magnetic field,which results in induced currents and Lorenz force in the biological tissue.The biological tissues then emitted sound waves that can be used for reconstructing the conductivity distribution image.In spite of the current achievements in MAT-MI techniques,the research is still in its infancy due to various theoretical and experimental problems to be solved.In this review,the authors also summarize the challenges in the study of MAT-MI.更多还原