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Titolo:
On the heating of linear conductive structures as guide wires and catheters in interventional MRI
Autore:
Nitz, WR; Oppelt, A; Renz, W; Manke, C; Lenhart, M; Link, J;
Indirizzi:
Univ Regensburg, Dept Radiol, D-8400 Regensburg, Germany Univ Regensburg Regensburg Germany D-8400 ol, D-8400 Regensburg, Germany
Titolo Testata:
JOURNAL OF MAGNETIC RESONANCE IMAGING
fascicolo: 1, volume: 13, anno: 2001,
pagine: 105 - 114
SICI:
1053-1807(200101)13:1<105:OTHOLC>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
FIELD INHOMOGENEITIES; VISUALIZATION; FLUOROSCOPY;
Keywords:
MRI-guided intervention; vascular interventions; interventional MRI; RF transmit coil; nonconducting guide wires;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Nitz, WR Univ Hosp Regensburg, Dept Diagnost Radiol, D-93042 Regensburg, Germany Univ Hosp Regensburg Regensburg Germany D-93042 nsburg, Germany
Citazione:
W.R. Nitz et al., "On the heating of linear conductive structures as guide wires and catheters in interventional MRI", J MAGN R I, 13(1), 2001, pp. 105-114

Abstract

The Interest in performing vascular interventions under magnetic resonance(MR) guidance has initiated the evaluation of the potential hazard of longconductive wires and catheters. The objective of this work is to present asimple 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 highvoltages 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 thewire. A safe alternative would be the use of nonconducting guide wires. (C) 2001 Wiley-Liss, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/01/20 alle ore 21:08:29