FIG. 4.

B₁⁺ magnitude in axial slice through the cardiac region of the NORMAN heart centered model (channel 2 shown). a: Idealized Coil Model. b: Differences from ICM when using FCM with quadrature normalization, active decoupling by fitting and active decoupling by pickup coils. c: Normalized RMS difference in B₁⁺ between FCM and ICM for the eight channels; the dashed lines correspond to averages over all channels. d–f: As parts (a–c) for phase of B₁⁺.