Patent ID: 11229415

Abstract:
An arm moving mechanism 200 includes a first rotatable member 26 mounted on base 27 so as to be rotatable about a first rotation axis 31 perpendicular to the base 27, a second rotatable member 25 mounted on the first rotatable member 26 so as to be rotatable about a second rotation axis 32 perpendicular to the base 27, a C-shaped arm support frame 24 mounted on the second rotatable member 25 so as to be rotatable about a third rotation axis 33 perpendicular to the base 27, motors for rotating them, and a controller for controlling the motors. When the first rotatable member 26, the second rotatable member 25, and the C-shaped arm support frame 24 are moved, the radiation irradiation unit 11 and the radiation detection unit 14 are moved linearly between the imaging position for performing radiographic imaging and the retreat position retreated from the imaging position.