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Abstract

An X-ray CT image displaying method, an X-ray CT image displaying apparatus, and an X-ray CT apparatus are proposed and disclosed, in order to produce and display the occlusal plane surface image seen upwardly and downwardly from the inside of the oral cavity of the jaw so as to face each other on the basis of the occlusal surface, if the occlusal surface which is important for the dental diagnosis is specified on the basic image or the image data according to the X-ray absorption coefficient distribution information produced from X-ray projection image of the head of an object to be examined. The X-ray CT image displaying method for displaying X-ray CT image of the head by X ray CT comprises: an occlusal surface specifying step of receiving an occlusal surface specifying in the X-ray image data obtained by X-ray CT of the head; an image producing step of producing from the X-ray image data an upward occlusal plane images seen upwardly from inside of the oral cavity of the jaw of the head and a downward occlusal plane image seen downwardly from the inside of the oral cavity both on the basis of the occlusal surface specified by the occlusal surface specifying step; and a displaying step of displaying the two upward and downward occlusal plane images produced by the image producing step in a manner that the upward and downward occlusal plane images face each other.

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First Claim