| In vivo evaluation and proof of radiofrequency safety of a novel diagnostic MR-electrophysiology catheter. | |
| | |
MedLine Citation:
|
PMID: 21337409 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
|
An MR-electrophysiology (EP) catheter is presented that provides full diagnostic EP functionality and a high level of radiofrequency safety achieved by custom-designed transmission lines. Highly resistive wires transmit intracardiac electrograms and currents for intracardiac pacing. A transformer cable transmits the localization signal of a tip coil. Specific absorption rate simulations and temperature measurements at 1.5 T demonstrate that a wire resistance > 3 kΩ/m limits dielectric heating to a physiologically irrelevant level. Additional wires do not increase tip specific absorption rate significantly, which is important because some clinical catheters require up to 20 electrodes. It is further demonstrated that radiofrequency-induced and pacing-induced resistive heating of the wires is negligible under clinical conditions. The MR-EP catheters provided uncompromised recording of electrograms and cardiac pacing in combination with a standard EP recorder in MR-guided in vivo EP studies, and the tip coil enabled fast and robust catheter localization. In vivo temperature measurements during such a study did not detect any device-related heating, which confirms the high level of safety of the catheter, whereas unacceptable heating was found with a standard EP catheter. The presented concept for the first time enables catheters with full diagnostic EP functionality and active tracking and at the same time a sufficient level of radiofrequency safety for MRI without specific absorption rate-related limitations. Magn Reson Med, 2011. © 2010 Wiley-Liss, Inc. |
| | |
Authors:
|
Steffen Weiss; Daniel Wirtz; Bernd David; Sascha Krueger; Oliver Lips; Dennis Caulfield; Steen Fjord Pedersen; Julian Bostock; Reza Razavi; Tobias Schaeffter |
Related Documents
:
|
14616299 - Mri and eeg findings in surgically treated patients with partial seizures due to neuron... 9541299 - Loss of digitations of the hippocampal head on high-resolution fast spin-echo mr: a sig... 3142889 - Spect measurements with 99mtc-hm-pao in focal epilepsy. 1759099 - Periodic hypersomnia: case report with biochemical and eeg findings. 3424029 - Seventy black epileptics. cysticercosis, computed tomography and electro-encephalography. 8218429 - Chronological changes of mri findings on striatal damage after acute cyanide intoxicati... 11688699 - Reversible brain atrophy and subcortical high signal on mri in a patient with anorexia ... 16631509 - Atherosclerotic plaque characterization by multidetector row computed tomography angiog... 18701759 - Intrinsic functional relations between human cerebral cortex and thalamus. |
Publication Detail:
|
Type: Journal Article Date: 2010-11-03 |
Journal Detail:
|
Title: Magnetic resonance in medicine : official journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonance in Medicine Volume: 65 ISSN: 1522-2594 ISO Abbreviation: Magn Reson Med Publication Date: 2011 Mar |
Date Detail:
|
Created Date: 2011-02-21 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 8505245 Medline TA: Magn Reson Med Country: United States |
Other Details:
|
Languages: eng Pagination: 770-7 Citation Subset: IM |
Copyright Information:
|
Copyright © 2010 Wiley-Liss, Inc. |
Affiliation:
|
Philips Technologie GmbH Forschungslaboratorien, Sector Imaging Systems and Intervention, Hamburg, Germany. Steffen.Weiss@philips.com. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Regional and global pancreatic T*(2) MRI for iron overload assessment in a large cohort of healthy s...
Next Document: Histogram analysis of the microvasculature of intracerebral human and murine glioma xenografts.