X-ray generation apparatus and x-ray radiographic apparatus

An X-ray radiographic apparatus comprising:

• an X-ray generation apparatus of transmission type including;
• an electron emission source, and
• a target generating an X-ray with collision of electrons emitted from the electron emission source against the target,
• the X-ray generation apparatus further including a secondary X-ray generation portion generating an X-ray with collision of electrons reflected by the target against the secondary X-ray generation portion,
• the secondary X-ray generation portion and the target being arranged such that the X-ray generated with the direct collision of the electrons against the target and the X-ray generated with the collision of the electrons reflected by the target against the secondary X-ray generation portion are both radiated to an outside;
• an X-ray detector configured to detect an X-ray having been radiated from the transmission-type X-ray generation apparatus and having transmitted through a subject;
• and
• a control unit configured to control the X-ray generation apparatus and the X-ray detector.