磁感应磁声耦合成像声信号采集方式对比研究

Comparison study of acoustic signal acquisition methods in magnetoacoustic tomography with magnetic induction

目的:探讨将换能器阵列应用于磁感应磁声耦合成像技术的可能性,并将成像结果与单个换能器成像结果对比。方法:建立电导率中心对称和非中心对称组织模型,分别进行单个换能器和换能器阵列采集声信号,并重建声源分布图像。结果:对于无论是中心对称组织模型还是非中心对称组织模型,换能器阵列重建的结果均优于单个声换能器重建的结果,换能器阵列采集声信号的适应性比较好。结论:换能器阵列更适用于各种形状组织模型,具有一定的临床应用价值。

Objective To investigate the possibility of applying transducer array in magnetoacoustic tomography with magnetic induction, and to compare the imaging results with those obtained with a single transducer. Methods After the centrosymmetric and non-centrosymmetric electrical conductivity models were established, the acoustic signals were collected with a single transducer and transducer array, and the acoustic source images were reconstructed, respectively. Results For the centrosymmetric or non-centrosymmetric electrical conductivity models, the reconstructed results obtained with transducer array were better than those obtained with a single acoustic transducer, and the adaptive performance of acoustic signals obtained with transducer array was better. Conclusion Transducer array is more suitable for the tissue models of various shapes, with clinical application value.