Magnetic resonance imaging apparatus and readout gradient magnetic field error correction method

摘要

In the non-linear measurement without the dephasing readout gradient magnetic field, to reduce the quality loss due to its positional shift of the k-space data resulting from the deviation of the calculated value and the readout gradient magnetic field actually applied. To do this, when executing the imaging pulse sequence with the nonlinear measurement without the dephase gradient magnetic field, the data for executing the pre-scan sequence, was obtained by pre-scanning, the present invention, the setting value of the readout gradient I calculates a correction value for correcting the deviation of. When gridding the data obtained by the imaging pulse sequence, using the correction value, and corrects the parameter values ​​of the gridding and perform gridding.