Title :
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
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;
Conference_Titel :
Electromagnetic Compatibility (EMC EUROPE), 2012 International Symposium on
Conference_Location :
Rome
Print_ISBN :
978-1-4673-0718-5
DOI :
10.1109/EMCEurope.2012.6396905
