Radiofrequency power deposition near metallic wires during MR imaging: feasibility study using T1-weighted thermal imaging.
Annu Int Conf IEEE Eng Med Biol Soc
; 2007: 3894-7, 2007.
Article
em En
| MEDLINE
| ID: mdl-18002850
ABSTRACT
The presence of metallic conductors (implants, wires or catheters) is prohibited in MR imaging for safety purpose with respect to radiofrequency (RF) power deposition caused by RF excitation B1 field. This work describes the use of T1-weigthed MR imaging for estimating a thermal map around a metallic (copper) wire located in the center of a MR imaging unit during an imaging sequence. The experimental set up and the methodology used for capturing the elevation of temperature created by radiofrequency power deposition around the wire is presented. A proof of its efficiency to followup temperature elevation about 0,5 degrees C in a milimetric region of interest (pixel size 1 x 1 mm2, slice thickness 5 mm) located around the wire is given, leading to further developments of MR imaging in presence of metallic implants, coils or catheters.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Fios Ortopédicos
/
Imageamento por Ressonância Magnética
/
Cobre
Limite:
Humans
Idioma:
En
Revista:
Annu Int Conf IEEE Eng Med Biol Soc
Ano de publicação:
2007
Tipo de documento:
Article
País de afiliação:
França
País de publicação:
EEUU
/
ESTADOS UNIDOS
/
ESTADOS UNIDOS DA AMERICA
/
EUA
/
UNITED STATES
/
UNITED STATES OF AMERICA
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US
/
USA