Patent ID: 8587310
Filing Date: 2013-11-19
Classification: A61B,G01R

Abstract:
1. A magnetic resonance imaging device comprising at least one of a hardware processor and circuitry effecting: an imaging portion configured to apply a radio frequency magnetic field and a gradient magnetic field to a subject placed in a static magnetic field and to detect magnetic resonance signals generated from the subject, a calculator configured to process the magnetic resonance signals detected by the imaging portion, and a controller configured to control the imaging portion and the calculator, wherein: the imaging portion including: a diffusion-weighted imaging execution portion configured to detect the magnetic resonance signals according to a pulse sequence including a diffusion-weighted gradient magnetic field pulse, and a reference data acquisition portion configured to obtain reference data for detecting distortion amounts of k-space data caused by the diffusion-weighted gradient magnetic field pulse at an arbitrary position in a slice direction, and the calculator including: a characteristic data calculation portion configured to calculate distortion amounts for a read-out direction and a phase encoding direction and phase offset amounts at an arbitrary position in the slice direction from the reference data as characteristic data of the amounts of distortion of k-space data, a correction portion configured to correct the k-space data constituted by the magnetic resonance signals acquired by the diffusion-weighted imaging execution portion by using the characteristic data, and an image reconstruction portion configured to reconstruct an image from the data corrected by the correction portion.