DocumentCode :
1829571
Title :
Alterations in human ECG due to the MagnetoHydroDynamic effect: A method for accurate R peak detection in the presence of high MHD artifacts
Author :
Abi-Abdallah, D. ; Robin, V. ; Drochon, A. ; Fokapu, O.
Author_Institution :
Univ. of Technol. of Compiegne, Compiegne
fYear :
2007
fDate :
22-26 Aug. 2007
Firstpage :
1842
Lastpage :
1845
Abstract :
Blood flow in high static magnetic fields induces elevated voltages that contaminate the ECG signal which is recorded simultaneously during MRI scans for synchronization purposes. This is known as the magnetohydrodynamic (MHD) effect, it increases the amplitude of the T wave, thus hindering correct R peak detection. In this paper, we inspect the MHD induced alterations of human ECG signals recorded in a 1.5 Tesla steady magnetic field and establish a primary characterization of the induced changes using time and frequency domain analysis. We also reexamine our previously developed real time algorithm for MRI cardiac gating [1] and determine that, with a minor modification, this algorithm is capable of achieving perfect detection even in the presence of strong MHD artifacts.
Keywords :
biomedical MRI; electrocardiography; haemodynamics; magnetohydrodynamics; MRI scans; accurate R peak detection; blood flow; elevated voltages; high MHD artifacts; high static magnetic fields; human ECG alterations; magnetohydrodynamic effect; Blood flow; Electrocardiography; Humans; Magnetic field measurement; Magnetic fields; Magnetic resonance imaging; Magnetohydrodynamics; Magnetostatic waves; Perpendicular magnetic recording; Voltage; Adult; Algorithms; Arrhythmias, Cardiac; Artifacts; Electrocardiography; Electrodes; Electromagnetic Fields; Equipment Design; Heart Conduction System; Humans; Magnetic Resonance Imaging; Magnetics; Signal Processing, Computer-Assisted; Time Factors;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Engineering in Medicine and Biology Society, 2007. EMBS 2007. 29th Annual International Conference of the IEEE
Conference_Location :
Lyon
ISSN :
1557-170X
Print_ISBN :
978-1-4244-0787-3
Type :
conf
DOI :
10.1109/IEMBS.2007.4352673
Filename :
4352673
Link To Document :
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