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.