A real-time system changes a combination of coil elements and channel assignations for each echo by using a pulse sequence, and collects data without performing phase encoding. A host system then calculates a correlation value of data reconstructed for each channel and reference data. When the correlation value is smaller than a predetermined threshold value, the host system judges the coil element combination to be abnormal. The host system makes a level correction on the collected data and creates an alternative solution for the abnormal coil element combination, including a reduction of a number of channels.