Numerical and experimental evaluation of SAR hotspots for an endovascular stent graft at 1.5T and 3T

Author

Camps-Raga, Bruno ; Görtz, Wolfgang ; Schaefers, Gregor ; Mezape, Yoav ; Shalev, Alon

Author_Institution

MR:comp GmbH, Gelsenkirchen, Germany

fYear

2012

fDate

17-21 Sept. 2012

Firstpage

1

Lastpage

4

Abstract

A comparative, qualitative study of a numerical evaluation of specific absorption rates and the experimental assessment of temperature rise near an endovascular stent graft is presented in this work. This comparison is performed at nominal static magnetic fields of 1.5 and 3 T, which correspond to operating frequencies of nominal 64 and 128 MHz, respectively. Each of the two stent modules consists of several metallic coaxial struts, spaced along their common axis and spread over the full length. The analysis shows patterns of temperature increase which correlate with the SAR values determined numerically.

Keywords

biomedical MRI; biomedical equipment; electromagnetic wave absorption; medical computing; medical disorders; numerical analysis; phantoms; MRI; SAR hotspots; SAR values; endovascular stent graft; experimental evaluation; frequency 128 MHz; frequency 64 MHz; magnetic flux density 1.5 T; magnetic flux density 3 T; magnetic resonance imaging; metallic coaxial struts; numerical evaluation; specific absorption rates; static magnetic fields; temperature patterns; Heating; Magnetic resonance imaging; Phantoms; Probes; Radio frequency; Solid modeling; Temperature measurement; FDTD; MR safety; MRI; RF heating; SAR; electromagnetic fields; numerical simulation; phantom; stent graft; vascular implants;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Compatibility (EMC EUROPE), 2012 International Symposium on

Conference_Location

Rome

ISSN

2325-0356

Print_ISBN

978-1-4673-0718-5

Type

conf

DOI

10.1109/EMCEurope.2012.6396905

Filename

6396905