The purpose of this study was to simulate the variation of SAR caused by shifting the position of a cardiac array prototype when different B1-shimming phase vectors are employed. The variation of 10g average SAR distribution due to displacing the anterior array position on the thorax (central, shifted 5 cm to the right, left, head, foot and diagonal directions) was computed and analyzed using two human voxel models. The final goal is to determine maximal driving voltage of the array with adequate safety margins considering new hot-spots originated from possible array misplacement
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