Patent ID: 6728568
Filing Date: 2004-04-27
Classification: A61B,G01R

Abstract:
Magnetic resonance imaging method comprising;(a) applying slice selecting gradient magnetic fields and radio frequency excitation pulses to an object to be examined; (b) applying a series of readout gradient magnetic fields of alternating polarity to the object; (c) acquiring reference data by detecting a series of reference signals in the presence of said readout gradient magnetic fields but substantially in the absence of phase encoding gradient magnetic fields; (d) acquiring image data for reconstructing an MR image by performing a plurality of shots of said steps (a) and (b) and acquiring said image data form a series of echo signals in the presence of said readout gradient magnetic fields and also in the presence of phase encoding gradient magnetic fields, said shots being over time intervals TR, and said series of echo signals occurring at different times for different shots; and (e) phase correcting the image data acquired in the presence of phase encoding gradient magnetic fields by using the reference data acquired substantially in the absence of phase encoding gradient magnetic fields.