Magnetická rezonance plodu

Abstract

The mail goal of this diploma thesis is the experimental verification of fetal movement detection methods from abdominal ECG (aECG) with the potential to be used during magnetic resonance of imaging. The aECG signal contains the maternal component, the fetal component and the other interfering signals. An important parameter for evaluating fetal status is heart rate variability, the frequency from which fetal movements can be verified. The theoretical part deals with the current state of clinical use of magnetic resonance imaging in prenatal diagnosis, description of MR sequences suitable for magnetic resonance and classification of basic monitoring errors, with emphasis on movement artifacts that significantly affect the overall imaging method. Furthemore, a search of the current state of fetal motion detection is perfomed. The experimental part presents a solution a non-adaptive of fetal ECG signal extraction, from which the variability of fetal heart rate and amplitude of the fetal QRS complex are determined, both parametrs being dependent on fetal movement. Methods was used in the Matlab version 2020a software environment. Verification of the functionality of the proposed methods was perfomed on a real KTG record from clinical practice.