Effect of TR and BS pulse angle on ANR efficiency: (a) average ANR efficiency at constant SAR level; (b) ANR efficiency maps (scaled from 0 to 150). Left: QDAPX pulse, ΔfRF=500Hz, SAR= 55% of maximum, TR=74ms, imaging flip angle 25°, middle: QDAPX pulse, ΔfRF=500Hz, SAR= 55% of maximum, TR=1000ms, imaging flip angle 59°, and right: the reference scan, i.e. Fermi pulse, ΔfRF=8kHz, SAR= 98% of maximum TR=1000ms, imaging flip angle 59°.