Nitz, Wolfgang R. and Oppelt, Arnulf and Renz, Wolfgang and Manke, Christoph and Lenhart, Markus and Link, Johann (2001) On the heating of linear conductive structures as guide wires and catheters in interventional MRI. JOURNAL OF MAGNETIC RESONANCE IMAGING, 13 (1). pp. 105-114. ISSN 1053-1807
Full text not available from this repository.Abstract
The Interest in performing vascular interventions under magnetic resonance (MR) guidance has initiated the evaluation of the potential hazard of long conductive wires and catheters. The objective of this work is to present a simple analytical approach to address this concern and to demonstrate the agreement with experimental results. The first hypothesis is that a long conductive structure couples with the electric field of the radio frequency (RF) transmit coil. The second hypothesis is that this coupling induces high voltages near the wire ends. These voltages can cause tissue heating due to induced currents. The experimental results show an increase In coupling when moving a guide wire toward the wall of an RF transmit coil, documented with a temperature increase of a saline solution in close proximity to the tip of the guide wire. The coupling of the wire not only presents a potential hazard to the patient, but also interferes with the visualization of the wire. A safe alternative would be the use of nonconducting guide wires. (C) 2001 Wiley-Liss, Inc.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FIELD INHOMOGENEITIES; VISUALIZATION; FLUOROSCOPY; MRI-guided intervention; vascular interventions; interventional MRI; RF transmit coil; nonconducting guide wires |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Röntgendiagnostik |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 01 Mar 2022 10:08 |
| Last Modified: | 01 Mar 2022 10:08 |
| URI: | https://pred.uni-regensburg.de/id/eprint/41896 |
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