Fig. 1

Simulations of the RF-shimmed dual-channel transmit system (standard bore) in the body models “Duke” (left), and “Ella” (right) with and without high permittivity pads, shown in white. a Transverse cross-sections of the B ₁ ⁺ and b coronal maximum intensity projections of the 10 g-averaged SAR. The heart is outlined by the thin line. The phase settings are those calculated for maximum B ₁ ⁺ homogeneity for each individual case (see Fig. 2). The pads improve the B ₁ ⁺ homogeneity within the heart and significantly reduce local SAR throughout the body. All data are normalized to a mean B ₁ ⁺ of 1 μT in the transverse cross-section of the body model