PROBLEM TO BE SOLVED: To provide a medical apparatus which controls other radiation imaging apparatuses to perform safing processing when abnormality in a radiation dose value is detected in one radiation imaging apparatus.SOLUTION: A medical apparatus manages a plurality of radiation imaging apparatuses connected to the network, and includes an information acquisition part which acquires information on a radiation dose value when imaging a subject in accordance with image protocols respectively set to imaging parts of the radiation imaging apparatuses, a safeness conversion part which calculates a safety margin of the radiation dose at the imaging protocols on the basis of the radiation dose value acquired in the information acquisition part, a usage restriction part restricting imaging by the plurality of radiation imaging apparatuses by making the plurality of radiation imaging apparatuses perform safing processing in response to the safety margin calculated by the safeness conversion part, and a usage restriction relaxing part relaxing the restriction on imaging when the safeness becomes higher than a preset level by performing the safing processing.
