Medical x-ray photographing apparatus and x-ray photographing method

A medical X-ray photographing apparatus comprising:

• a support configured to turn an X-ray generator and an X-ray detector about a predetermined turning axis while holding said X-ray generator and said X-ray detector such that said X-ray generator and said X-ray detector face each other, said X-ray generator being configured to emit an X-ray, said X-ray detector being configured to output an electric signal according to an incident X-ray;
• a support holder configured to rotatably support said support;
• a turning mechanism configured to turn said support held by said support holder;
• a turning controller configured to control said turning mechanism;
• an image processor configured to generate an X-ray image by processing a plurality of projection images based on said electric signal;
• a light emitter disposed on a virtual loop line surrounding said turning axis;
• and
• a light emitter controller configured to control said light emitter in association with turning of said support.