有限视角感应式磁声成像方法仿真研究

感应式磁声成像（MAT-MI）是一种融合了磁感应成像技术和超声断层扫描成像技术的新型成像手段.针对现有感应式磁声成像的研究工作几乎全部基于全视角超声扫描数据进行图像重建，在没有完整数据可以使用的情况下，重建过程可能会引入较大误差和生成图像伪影的局限性.提出有限视角MAT-MI重建方法，以不同半径的声学均匀同心球模型为研究对象，仿真出样本内涡流、声源、声压的分布，并利用快速分裂Bregman法重建出了有限视角声源图像，进而重构出电导率分布.仿真结果表明：所提出的成像方法能够准确地重建有限视角声学均匀介质中的声源与电导率分布，有助于感应式磁声成像向临床应用迈进一步，具有重要的科学研究意义与实际应用价值.

Simulation Research of Limited-View Magnetoacoustic Tomography With Magnetic Induction Methods

Magnetoacoustic Tomography with Magnetic Induction (MAT-MI) is a new imaging modality that combines magnetic induction imaging technology and ultrasound tomography imaging technology. The existing research on MAT-MI build up the image reconstruction mostly based on the full-angle ultrasound scan data. So in the absence of complete data, the reconstruction process may introduce the large errors and generate image artifacts. In this paper, the limited view MAT-MI reconstruction method is proposed.Taking the acoustic uniform concentric sphere models with different radius as the research objects,we simulated the distribution of eddy current, sound source and sound pressure in the sample reestablished the limited-view sound source by using the fast splitting Bregman method, and finally reconstructed the conductivity distribution. The results showed that the proposed imaging method can accurately reconstruct the sound source and conductivity distribution in the acoustic medium with limited viewing angle. The research will help to promote the clinical application of MAT-MI, which has great scientific significance and actual application value.