X-ray CT Photographic Apparatus

An X-ray CT photographic apparatus comprising:

• an X-ray generator that generates an X-ray;
• an X-ray regulating unit that regulates an irradiation range of said X-ray generated from said X-ray generator and shapes said X-ray into an X-ray cone beam;
• an X-ray regulating controller that controls said irradiation range of said X-ray by controlling said X-ray regulating unit;
• an X-ray detector that detects said X-ray cone beam transmitted through a subject on a detection surface;
• a read region controller that changes a read region, where an X-ray detection signal of said X-ray cone beam is read in said X-ray detector, according to said irradiation range of said X-ray cone beam;
• a support body that supports said X-ray generator and said X-ray detector while said X-ray generator and said X-ray detector are opposed to each other with said subject therebetween;
• a support body turning drive unit that turns said support body about a turning shaft and turns said X-ray generator and said X-ray detector about said subject during X-ray photography;
• and
• a CT photographic region setting unit that receives and sets a setting manipulation of a CT photographic region being a target of an X-ray CT photography in said subject,
• wherein, assuming that a z-axis direction is an axis direction of said turning shaft, that an x-axis direction and a y-axis direction are two directions orthogonal to each other on a two-dimensional plane orthogonal to said z-axis direction, and that the y-axis direction is a direction from said X-ray generator toward said X-ray detector in said x-axis direction and y-axis direction,
• said X-ray regulating controller changes the irradiation range of said X-ray cone beam to said x-axis direction during said X-ray CT photography such that only a set CT photographic region is irradiated with said X-ray cone beam according to said set CT photographic region input through said CT photographic region setting unit, and
• said read region controller changes said read region with respect to said x-axis direction in said detection surface during said X-ray CT photography.