Patent ID: 7832926
Filing Date: 2010-11-16
Classification: A61B,G03B

Abstract:
1. An X-ray radiographing apparatus comprising: an X-ray detecting unit having an image reception surface and configured to detect X-rays passing through a subject; an image receptor housing the X-ray detecting unit and having a first locking portion; a support that supports the image receptor; a coupler having a second locking portion and being configured for detachably coupling the image receptor to the support, wherein the first locking portion and the second locking portion are configured to place the image receptor and the coupler in an attached state and a detached state; an X-ray generator disposed opposite to the coupler and that emits X-rays towards the image receptor; an X-ray restrictor having a rectangular opening and configured to block X-rays from the X-ray generator other than the X-rays passing through the subject; a first motor that rotates the X-ray restrictor around an X-ray irradiation axis which is perpendicular to the image reception surface; a second motor that rotates the image receptor around the X-ray irradiation axis; a detector configured to detect rotation of the image receptor when the second motor rotates the image receptor around the X-ray irradiation axis; and a control unit that controls the first motor and the second motor to control a direction of rotation of the X-ray restrictor and a direction of rotation of the image receptor, wherein the control unit controls rotation of the second motor and determines an initial position of the image receptor based on an output of the detector when the image receptor is attached to the coupler.