Patent ID: 8237439
Filing Date: 2012-08-07
Classification: G01R

Abstract:
1. A magnetic resonance imaging apparatus comprising: a static magnetic field source for generating a static magnetic field for aligning a spin vector of an object in a direction of the magnetic field; a plurality of radio frequency magnetic field sources for generating a radio frequency magnetic field for rotating the spin vector by an angle; a plurality of gradient magnetic field sources for generating a gradient magnetic field; a processor for generating a plurality of radio frequency excitation pulses for the plurality of radio frequency magnetic field sources and a plurality of simultaneous gradient excitation pulses for the plurality of gradient magnetic field sources, wherein a second half of each of the plurality of radio frequency excitation pulses comprises a time-reversed first half of a respective one of the plurality of radio frequency excitation pulses, wherein a second half of each of the plurality of gradient excitation comprises a time-reversed and sign-reversed first half of a respective one of the plurality of gradient excitation pulses, and wherein the average value of each of the plurality of gradient excitation pulses is zero.