able acquisition actual alley already amplitude applied assume assumed axes axis begins bias bottom calibrated calibrating central channel characteristics characterize chose compensation complete constant contribution convolution cross curves delay deliberately depicts derivative derived described despite determine deviation differentiating dimension distortion driven driving eddy eliminate encoded encoding ends equation exactly expanded expected exponential extract fashion finally fitted fraction function generally global gradient gradients hardware impossible induced inducing killer laboratory larger limitations literature locating long made magnet magnetization magnitude make manifest measure measured negative original paper parabola park part peak percent phantom phys pixel placed played plot plotted positive prescribed process processed produced promise pulse pulses quadratic quantify ramp reasonable reduce reduced reducing repeated repeats rewinder risk roughly science select self shimmed short shorter sided simultaneously sixteen slew slice slightly smaller space sphere spherical stepped steps switched switching system taken term terms traditionally trajectories trajectory transform transverse trapezoid trapezoidal typically various waveform waveforms