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Abstract #3489

A Setup for Continuous Arterial Spin Labeling with a 4 Channel Radiative Labeling Coil Allowing for High Duty Cycle Labeling at 7T

Wouter Koning1, Johanneke H. Bluemink1, Esben Petersen1, Alexander Raaijmakers1, Anke Henning2, Cornelis A.T. van den Berg1, Jaco Zwanenburg1, Peter Luijten1, Dennis W

1University Medical Center, Utrecht, Netherlands; 2ETH Zurich, Zurich, Switzerland

A setup is presented for the use of radiative antennas as external labeling coils for cASL at 7T. Four radiative antennas attached to a neck pillow filled with heavy water are used to create a B1 field in the neck. This neck pillow can be used in combination with a head coil for labeling during ASL experiments. SAR calculations show that using this setup labeling pulses for cASL can be used with a factor 5.5 longer duration than is allowed with the use of the head coil, while remaining within SAR safety guidelines.