1. A magnetic resonance imaging apparatus comprising magnetic field generation means for applying gradient magnetic fields and a radio-frequency magnetic field to a patient placed in a static magnetic field in a predetermined pulse sequence; a plurality of RF receiving coils for receiving the nuclear magnetic resonance signals generated from the patient; and image reconstruction means for reconstructing an image by processing the nuclear magnetic resonance signals measured by thinning the encode steps in a measuring space, wherein the image reconstruction means determines measured signal components at a plurality of points on a measuring slice section of the patient by a matrix calculation based on the correlation among the measured signals received by the RF receiving coils, the sensitivity distributions of the RF receiving coils and the measured signal components at the plurality of points on the measuring slice section as well as comprises means for eliminating for suppressing or eliminating the low signal region of the measured signals measured on the measuring slice section.