Finya Ketelsen1,2, Vincent Hammersen1, Kevin Kröninger2, and Gregor Schaefers1,3
1MRI-STaR - Magnetic Resonance Institute for Safety, Technology and Research GmbH, Gelsenkirchen, Germany, 2TU Dortmund University, Dortmund, Germany, 3MR:comp GmbH, Testing Services for MR Safety & Compatibility, Gelsenkirchen, Germany
1MRI-STaR - Magnetic Resonance Institute for Safety, Technology and Research GmbH, Gelsenkirchen, Germany, 2TU Dortmund University, Dortmund, Germany, 3MR:comp GmbH, Testing Services for MR Safety & Compatibility, Gelsenkirchen, Germany
This
study shows that the influence of spatial E-field homogeneity and E-field drift
during assessment should be considered for RF-induced heating of implants. Even
if the requirements according to ASTM
F2182 and ISO/TS 10974 are fulfilled, an underestimation of RF-induced heating
can occur.
Fig. 3: Temperature rise for 150V/m average
incident E-field for all four objects for both systems.
Fig. 2: Measured E-field distributions with 0dB
and ±1dB
isolines and the placement of the 300mm-long rod for the (a) birdcage coil and (b)
linear exposure system case.
