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Abstract #2705

Influence from Static Magnetic Fields on Fiber-Optical Temperature Probes - Effects on Safety Measurements at 7T

Jens Groebner1, Moritz Cornelius Berger1, Wolfhard Semmler1, Jaane Rauschenberg1

1Dept. of Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany

Fiber-optical temperature probes are commonly used in MR safety measurements on implants. In this work it could be shown that fiber-optical temperature measurements are B0-dependant and exhibit non-linear temperature dependence: A temperature drop of 2.6C at 7T compared to the earth magnetic field and relative temperature differences of 0.30C between 20C and 60C at 7T were observed.