An image processing apparatus according to an embodiment includes a processor and a memory. The memory stores processor-executable instructions that, when executed by the processor, cause the processor to: receive an input of information designating an observation target； extract, from each of magnetic resonance (MR) images included in an MR image group collected by applying a tagging pulse to a region where a fluid flows, a group of regions of the fluid； analyze, by an analyzing method associated with the observation target, the group of regions of the fluid extracted from each of the MR images, thereby deriving an index indicating a dynamic state of the fluid； and cause the index to be displayed on a display.
