SEARCH Articles Figures Tables ENHANCED SELECTIVITY Field enhancement Field gradient Field pulses Gradient enhanced Gradient enhancement Gradient magnetic fields Gradient pulse Gradient pulsed Gradient selected Magnet magnetic field gradients Magnetic enhancement Magnetic field pulsing Magnetic field selection Magnetic field-gradients pulsed Magnetic gradient Pulse field gradient Pulse field gradients, pulsed Pulsed field gradient Pulsed fields Pulsed magnet Selectivity enhancement