Radiation computed tomography apparatus

A radiation computed tomography apparatus for obtaining a tomographic image of a patient, comprising:

• a couch which is movable in a predetermined direction;
• a top board which carries the patient and is slidably arranged on said couch;
• a gantry which has an opening and acquires projection data of the patient by guiding the patient carried on said top board into the opening;
• reconstruction means for reconstructing the tomographic image of the patient by reconstructing the projection data acquired by said gantry in real-time;
• display means for displaying the tomographic image of the patient reconstructed by said reconstruction means in real-time;
• detecting means for detecting at least a direction of an external force applied to one of said top board and said gantry;
• and
• means for driving the one of said top board and said gantry, to which the external force is applied, in the direction of the external force on the basis of a detection value of said detecting means.