A sequence control (40) causes a transmitter (24) and gradient amplifiers (20) to transmit appropriate radio frequency excitation and other pulses to induce magnetic resonance in selected dipoles and cause the magnetic resonance to be refocused into a series of echoes following each excitation. A receiver...http://www.google.com/patents/US5621321?utm_source=gb-gplus-sharePatent US5621321 - Magnetic resonance scan calibration method for ultra-fast image acquisition
