X-ray photography apparatus

摘要

An X-ray photography apparatus including: a turning arm that supports an X-ray generator and an X-ray detector while the X-ray generator and the X-ray detector are opposed to each other so that a head of a patient can be interposed therebetween; and a moving mechanism that turns the turning arm about a turning axis with respect to the head and moves the turning arm in a direction perpendicular to the turning axis with respect to the head. The X-ray photography apparatus further includes: an image processor that generates an X-ray image based on an electric signal output from the X-ray detector; and a photographic region designation receiving part that designates part of a row of teeth along a dental arch as a pseudo intraoral radiography region. The image processor generates plural tomographic images by applying convolution and filtered back projection to X-ray image data obtained by pseudo intraoral radiography.

主权项

1. An X-ray photography apparatus comprising:
a support that supports an X-ray generator and an X-ray detector while said X-ray generator and said X-ray detector are opposed to each other so that a head of a patient can be interposed therebetween, said X-ray detector outputting an electric signal according to an intensity of an incident X-ray; a moving mechanism that includes a turning part and a moving part, the turning part relatively turning said X-ray generator and said X-ray detector about head by turning said support relative to said head about a predetermined turning axis, and the moving part relatively moving said support to said head in a direction perpendicular to said turning axis; an image processor that generates a tomographic image related to a specific tomographic plane from a projection image of an X-ray based on said electric signal output from said X-ray detector; a photographic region designation receiving part that receives an operation to designate a region including a row of teeth or part of a gum as a pseudo intraoral radiography region, said row of teeth or said gum being spread along a curve of a dental arch; and a controller that performs pseudo intraoral radiography to said pseudo intraoral radiography region in which designation is received by said photographic region designation receiving part, the X-ray generator irradiating said pseudo intraoral radiography region with the X-ray, said image processor performing different methods of image processing to X-ray image data obtained by said pseudo intraoral radiography, and generating a plurality of tomographic images in which information contents related to X-ray absorption before and behind said specific tomographic plane differ from each other.