MRI echo data is acquired by performing selective-excitation on regions
composed of multi-slices of an object, while the object is moved
continuously. The positions of the multi-slices are moved within a
predetermined imaging range fixedly determined by an MRI system,
according to object movement. This allows positions of the multi-slices
to be changed in compliance with the moved object, so that the
multi-slices positionally track with the object within the imaging range.
Accordingly, a multi-slice imaging technique can be provided, which is
executable during even continuous movement of the object.