Magnetic resonance imaging device and control method thereof

A magnetic resonance imaging device comprising:

• a measurement unit configured to collect a nuclear magnetic resonance signal from a subject, the measurement unit executing a pulse sequence including performing, after applying one excitation RF pulse (1 shot), a main scan for measuring an echo signal for image reconstruction, and a navigator scan for measuring an echo signal for distortion correction, an applied polarity of phase encoding in the navigator scan being opposite to an applied polarity of phase encoding in the main scan;
• and
• an image calculation unit configured to generate an image by using the nuclear magnetic resonance signal collected by the measurement unit,
• the image calculation unit including
• a displacement amount calculation unit configured to calculate a displacement amount of a main scan image, by using the echo signal obtained by the navigator scan, and
• a distortion correction unit configured to correct distortion of the main scan image by using the displacement amount calculated by the displacement amount calculation unit, to cause a corrected image to be output.