X-ray ct imaging device

An X-ray CT imaging device for performing X-ray CT imaging of a CT imaging area of a subject, the X-ray CT imaging device comprising:

• an imaging mechanism including an X-ray generator for generating X-ray, an X-ray restriction section for blocking and restricting a radiation range of the X-ray generated by the X-ray generator to form an X-ray cone beam to be directed to the CT imaging area, and an X-ray detector for detecting the X-ray cone beam directed to the subject;
• a support for supporting the X-ray generator and the X-ray detector in the state where the X-ray generator and the X-ray detector have the subject therebetween;
• an imaging mechanism driving section for revolving the support at least about an axis of a revolution shaft with respect to the subject;
• and
• a control section for controlling at least the X-ray generator, the X-ray restriction section and the imaging mechanism driving section;
• wherein:
• a direction parallel to a direction of the axis of the revolution shaft is a length direction;
• and
• the X-ray restriction section includes:
• a length direction X-ray blocking section for blocking and restricting the radiation range of the X-ray cone beam in the length direction with respect to the CT imaging area;
• and
• a length direction adjusting section for, during the X-ray CT imaging when the support is revolving, adapting an expansion in the length direction of the X-ray cone beam, which is to be restricted by the length direction X-ray blocking section, to a shape of the CT imaging area in accordance with a revolution position of the imaging mechanism driven by the imaging mechanism driving section, the length direction adjusting section being controllable by the control section.