An MRI apparatus which performs MR imaging in an SSFP pulse sequence in
which RF excitation is accomplished by a phase cycling method is caused;
to collect data regarding all the frequency regions in a k-space in an
SSFP pulse sequence in a first phase series out of a plurality of phase
series; to collect data regarding low frequency regions in the k-space in
the SSFP pulse sequence in the remaining phase series out of the
plurality of phase series; to reconstruct an image by Fourier transform
of the data regarding all the frequency regions collected in the SSFP
pulse sequence in said first phase series; to generate frequency data of
the k-space by inverse Fourier transform of said image; to separate said
frequency data into data of the low frequency regions in the k-space and
data of high frequency regions; to add data whose value is 0 to said
separated data of the low frequency regions as substitute for the data of
the high frequency regions; to add data whose value is 0 to said
separated data of the high frequency regions as substitute for the data
of the low frequency regions; to add data whose value is 0 to the data of
the low frequency regions collected in the SSFP pulse sequence in the
remaining phase series as substitute for the data of the high frequency
regions; to reconstruct low space frequency images based on the low
frequency regions to which said substitute data have been added; to
reconstruct high space frequency images based on the high frequency
regions to which said substitute data have been added; and to totally add
said low space frequency images and said high space frequency images
multiplied by a scaling factor.