Buchenberg, Waltraud B; Mader, Wolfgang; Hoppe, Georg; Lorenz, Ramona; Menza, Marius; Büchert, Martin; Timmer, Jens; Jung, Bernd (2014). In vitro study to simulate the intracardiac magnetohydrodynamic effect. Magnetic resonance in medicine, 74(3), pp. 850-857. Wiley-Liss 10.1002/mrm.25456
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PURPOSE
Blood flow causes induced voltages via the magnetohydrodynamic (MHD) effect distorting electrograms (EGMs) made during magnetic resonance imaging. To investigate the MHD effect in this context MHD voltages occurring inside the human heart were simulated in an in vitro model system inside a 1.5 T MR system.
METHODS
The model was developed to produce MHD signals similar to those produced by intracardiac flow and to acquire them using standard clinical equipment. Additionally, a new approach to estimate MHD distortions on intracardiac electrograms is proposed based on the analytical calculation of the MHD signal from MR phase contrast data.
RESULTS
The recorded MHD signals were similar in magnitude to intracardiac signals that would be measured by an electrogram of the left ventricle. The dependency of MHD signals on magnetic field strength and electrode separation was well reflected by an analytical model. MHD signals reconstructed from MR flow data were in excellent agreement with the MHD signal measured by clinical equipment.
CONCLUSION
The in vitro model allows investigation of MHD effects on intracardiac electrograms. A phase contrast MR scan was successfully applied to characterize and estimate the MHD distortion on intracardiac signals allowing correction of these effects. Magn Reson Med, 2014. © 2014 Wiley Periodicals, Inc.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
04 Faculty of Medicine > Department of Radiology, Neuroradiology and Nuclear Medicine (DRNN) > Institute of Diagnostic, Interventional and Paediatric Radiology |
UniBE Contributor: |
Jung, Bernd |
Subjects: |
600 Technology > 610 Medicine & health |
ISSN: |
0740-3194 |
Publisher: |
Wiley-Liss |
Language: |
English |
Submitter: |
Aisha Stefania Mzinga |
Date Deposited: |
01 May 2015 15:05 |
Last Modified: |
05 Dec 2022 14:45 |
Publisher DOI: |
10.1002/mrm.25456 |
PubMed ID: |
25224650 |
Uncontrolled Keywords: |
electrophysiology hemodynamics in vitro model system intracardiac electrograms magnetohydrodynamic effect phase contrast MRI |
BORIS DOI: |
10.7892/boris.66859 |
URI: |
https://boris.unibe.ch/id/eprint/66859 |
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