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提出了一种多时窗的波束形成器,可以从多通道心脏磁场测量数据中估计强、弱和持续时间长短不同的等效电流源.这种心脏电活动可视化技术将有助于相关心脏疾病的诊断.通过两个已知电流源的仿真实验说明了这种方法的可行性.并通过一个完全左束支传导阻滞和一个完全右束支传导阻滞病人的心脏QRS段磁场测量数据的源估计结果及其二维电兴奋传播图的比较,分析了用这种成像方法揭示的心脏电生理现象.
A multi-time windowed beamformer is proposed to estimate the equivalent current source with different strengths and weaknesses and different durations from multi-channel cardiac magnetic field measurement data.This visualization of cardiac electrical activity will be helpful to the related cardiac diseases Diagnostics. The feasibility of this approach was demonstrated by simulations of two known current sources and the source of QRS segment magnetic field measurement data from a patient with a complete left bundle branch block and a complete right bundle branch block The estimated results and their comparison of two-dimensional electrical excitations are analyzed and the cardiac electrophysiological phenomena revealed by this imaging method are analyzed.