Modelování vlivu magnetické rezonance na diagnostickou kvalitu EKG a VKG signálů

Abstract

The aim of this diploma thesis is a quantitative analysis of the symptoms of the effect of magnetic resonance on the quality of ECG and VCG signals. The theoretical part of the thesis basically describes the electrical activity of the heart and the recording of this activity using an electrocardiogram (ECG) and its transformation into a vector cardiogram (VCG). The theoretical part further describes known methods for the analysis of the effect of magnetic resonance on the deformation of the ECG and VCG signal. In the practical part of the work, a QRS complex detector is designed for ECG signals sensed outside and inside the magnetic resonance. The detector is realized by analyzing independent components. To meet the goal of the work, it was necessary to create a database of ECG and VCG signals, scanned outside and inside the MR. VCG signals were obtained by four transformation methods - Kors regression, inverse Dower, Levkov and QLSV. ECG signals, QRS complexes and VCG curves were subsequently analyzed. The statistical indicators correlation coefficient, MSE, RMSE and MAE were used to assess the changes. To assess VCG curves, the parameters of the curvature vector of the curve, the maximum size of the QRS loop vector, the maximum distance of the QRS loop and its center of gravity and the circumference of the QRS loop.