FIELD: physics.
SUBSTANCE: invention can be used for magnetic resonance imaging. When generating an MR image using a multi-channel transmit coil arrangement, SAR is reduced by employing a number of different RF pulses in a single scan. Each RF pulse exhibits a different performance and/or accuracy, resulting in different RF pulse-specific SAR values. As a result, the RF pulses differ slightly in actual excitation pattern, B1 waveform and/or k-space trajectory, etc.
EFFECT: reducing average SAR over a single scan compared to a fixed RF pulse, without compromising image quality.
14 cl, 8 dwg
