Patent ID: 7577232

Claim:
A medical X-ray imaging apparatus comprising a rotary means rotatable relative to an object to be examined, an X-ray generator provided at one side of the rotary means, and an X-ray detecting portion provided at the other side of the rotary means so as to face the X-ray generator, wherein an X-ray detector is provided in said X-ray detecting portion or is detachably mounted in said X-ray detecting portion, and said X-ray detector is provided with an imaging portion comprised of a plane electric imaging means extending in a two-dimensional direction to detect an X-ray cone beam used for X-ray CT, and an imaging portion positioning means for moving up and down said imaging portion in said X-ray detector, and wherein said medical X-ray imaging apparatus is further provided with a mode switching means for selecting a panoramic radiography mode and an X-ray CT mode, wherein an X-ray slit beam for panoramic radiography is irradiated in said panoramic radiography mode and said X-ray cone beam for said X-ray CT is irradiated in said X-ray CT mode, and wherein said X-ray generator is further provided with an irradiating direction changing means for changing the irradiating direction of the X-ray cone beam for said X-ray CT to be emitted up and down therefrom corresponding to a position of said imaging portion in said X-ray CT mode by moving up and down a slit for forming an X-ray beam as said X-ray cone beam for X-ray CT positioned at an X-ray radiation port of said X-ray generator.