Magnetic resonance imaging apparatus and method correcting phases in images corresponding to a plurality of time phases

A magnetic resonance imaging method comprising:

• executing first data acquisition to acquire first echo signals for a phase correction map;
• executing second data acquisition in each of a plurality of time phases to acquire second echo signals for a plurality of images at time phases;
• generating the phase correction map by using the first echo signals acquired through the first data acquisition;
• generating an image for each of the plurality of time phases by using the second echo signals acquired through the second data acquisition;
• and
• based on the phase correction map and changes in phase that occur in the second echo signals between the plurality of time phases, correcting a phase of each of the images generated for the plurality of time phases.

A magnetic resonance imaging apparatus comprising processing circuitry configured to:

• execute first data acquisition to acquire data for a phase correction map, and second data acquisition to acquire data for a cluster of images corresponding to a plurality of time phases;
• generate the phase correction map by using at least one echo signal acquired through the first data acquisition;
• generate the cluster of images corresponding the time phases by using echo signals acquired through the second data acquisition;
• and
• based on the phase correction map and changes in phase of echo signals that occur between time phases, correct phases of the respective images included in the cluster of images,
• wherein the processing circuitry:
• executes the first data acquisition at a time point before the time phases;
• and
• based on the changes in phase of echo signals that occur between the time phases, corrects the phase correction map with respect to each of the time phases, and corrects changes in phase between the images by using the corrected phase correction map, and
• wherein, based on changes in center frequency of echo signals acquired during an effective echo time (TE) among the echo signals acquired through the second data acquisition, the processing circuitry corrects the phase correction map with respect to each of the time phases.

A magnetic resonance imaging apparatus comprising processing circuitry configured to:

• execute first data acquisition to acquire data for a phase correction map, and second data acquisition to acquire data for a cluster of images corresponding to a plurality of time phases;
• generate the phase correction map by using at least one echo signal acquired through the first data acquisition;
• generate the cluster of images corresponding the time phases by using echo signals acquired through the second data acquisition;
• and
• based on the phase correction map and changes in phase of echo signals that occur between time phases, correct phases of the respective images included in the cluster of images,
• wherein the processing circuitry:
• executes the first data acquisition at a time point before the time phases;
• and
• based on the changes in phase of echo signals that occur between the time phases, corrects the phase correction map with respect to each of the time phases, and corrects changes in phase between the images by using the corrected phase correction map, and
• wherein the processing circuitry:
• executes the second data acquisition for each of a plurality of adjacent slices with a readout gradient magnetic field and a phase-encoding gradient magnetic field both applied;
• based on echo signals regarding at least one slice of the slices, generates a phase correction map for each of the time phases;
• and
• based on changes in phase in the phase correction map generated with respect to the respective time phases, corrects changes in the phase correction map in phase in the readout direction and in the phase-encoding direction with respect to each of the time phases.