3870 Extending the sensitivity of a transmit / receive radiofrequency coil with dielectric materials at 7 T

combination of a small surface coil with three dielectric discs (B) and an array with three surface coils (C), all covering the same portion of the object. Top view of the coil conductors (orange) is shown on the first row. Dielectric discs are depicted in blue, whereas the gray circle indicates a transverse section of the phantom through the center of the coil/array. The length of the phantom was 400 mm. The distance of the coils from the phantom was 25 mm in all cases. Red dotted line indicates the line along which the profiles were measured (Fig3).