1. A magnetic resonance imaging apparatus comprising: an acquiring device for exciting spins within a subject to acquire an imaging echo generated by the excited spins along with a navigator echo, with a reduced field-of-view via a plurality of receiver systems; the first correcting device for conducting phase correction on said imaging echo based on said navigator echo; the first image producing device for producing an intermediate image based on said phase-corrected imaging echo from each of said plurality of receiver systems; a generating device for generating a sensitivity matrix for said plurality of receiver systems; the second correcting device for phase-correcting matrix data in said sensitivity matrix; and the second image producing device for producing an image with a full field-of-view based on said intermediate image and said phase-corrected sensitivity matrix.