To facilitate data exchange between with the outside by integrating connection to be one process and providing an image graphic, so as to improve flexibility for a medium system architecture with an image constituting device.

A CT unit for computer tomography 1, an MR unit for magnetic resonance 2, a unit for digital subtraction angiography 3 and an X-ray unit 4 for digital radiography 4 are respectively controlled by the work stations 5 to 8 of computers to process images to be stored and to store in a central image memory 10 through a communication network 9 to transfer to the work stations 5 to 8. In addition an image is transferred to other workstations 11 and 12 and an image and data are exchanged between with various network through a network interface 15 on a worldwide scale.