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Abstract #0550

Comparison of Local and Remote Transmit Arrays for Body Imaging at 7T under Power and Local SAR Constraints

Martina Flser 1,2 , Andreas K. Bitz 1 , Stephan Orzada 2 , Klaus Solbach 3 , and Mark E. Ladd 1,2

1 Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany, 2 Erwin L. Hahn Institute for MRI, University Duisburg-Essen, Essen, Germany, 3 High Frequency Engineering, University Duisburg-Essen, Duisburg, Germany

So far, local coil arrays that are placed directly on the subject are most commonly used for body imaging at 7T. Placing the coil array under the bore liner would simplify the workflow and increase subject comfort. Therefore, we compare the performance of several local and remote body coil arrays under power and local SAR constraints in simulations. While tight-fitting coil arrays perform better in axial slices, remote arrays achieve better B 1 + homogeneity in coronal and sagittal slices. Arranging the coil elements in multiple rings can be beneficial for B 1 + homogeneity, but is power and SAR demanding.

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