To provide an image processing apparatus that changes methods of storage to a memory depending on image data to be input and improves overall image processing performance, as well as a control method of the image processing apparatus. The main housing body includes a first compartment for housing the motor and a second compartment for housing the cutting wheel. The nonvolatile memory 12 is provided with a plurality of dirty pages and a page table memory unit 51. An interpolation processor interpolates the PET blob image directly into the CT voxel space. Transport network efficiency is achieved by statistical multiplexing without significant increase in buffer memory requirements or introduction of latency into the flow control mechanism. More specifically, the present invention relates to a microfluidic method and device for the separation of particles according to size using an array comprising a network of gaps, wherein the field flux from each gap divides unequally into subsequent gaps.