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Abstract

A magnetic resonance imaging apparatus has means for detecting the movement of an object so as to correct the variation of the non-uniformity of static magnetic field because of the movement of the object and thereby to improve the quality of the MR image. When actually measured data is corrected by using a signal for correcting the static magnetic field obtained in a preliminary measurement, the influence of the non-uniformity of static magnetic field is eliminated from the image based on the information from the body movement detecting means by using a correcting signal measured at the same time phase of the periodic movement as that of the actually measured signal. A navigation echo measured during the same repetition time as that of the actually measured signal is used for detection of time phase by detecting means. As a result, the quality of image is not deteriorated by the variation of the non-uniformity of static magnetic field due to the movement of the body of the object, realizing imaging of high quality image.

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