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Abstract #1906

Travelling Wave Coil with Limited SAR

Marco Mueller1, Stefan Alt1, Reiner Umathum1, Wolfhard Semmler1, Michael Bock1

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

Travelling wave MRI exposes the human body to high levels of SAR. Recently, a targeted travelling wave approach using an interrupted coaxial waveguide was presented. We present hardware measurements about the opportunity of SAR restriction by using a travelling wave coaxial coil with variable imagion regions. Signal and flip angle distributions were calculated and evaluated for different sizes of the variabel imaging regions. The measurements show a good RF restriction to the respective imaging region.