An apparatus includes a unit which acquires, by a first sequence, an MR signal before administration of a contrast agent and which also acquires, by a second sequence, an MR signal after the administration, the first sequence dephasing a magnetization after RE excitation to make a greater signal reduction in a first signal component regarding a fluid flowing within a first range than in a second signal component regarding the fluid flowing within a second less than the first range, the second sequence bringing the MR signal after the administration to a level corresponding to the concentration of the agent, a unit which reconstructs first and second images, and a unit which generates a third image on the basis of the first and second images, the third image showing the degree of a change of the fluid after the administration from a state before the administration.