| 摘要 |
The invention relates to an assembly for executing a cone-beam X-ray imaging process. The assembly comprises in the path of X-radiation at least two reference markers ( 26 ), which comprise materials whose densities are different from each other. In view of performing a cone-beam X-ray imaging process, the assembly comprises an X-ray source ( 6 ) for generating X-radiation and transmitting it to an object ( 2 ), a collimator ( 7 ) collimator before the object for collimating the X-radiation for a conical or pyramidal beam of rays, a detector ( 8 ) capable of receiving X-radiation transmitted through the object for providing X-ray image information, scanner means ( 16 ), on the basis of whose movements said X-ray imaging is effected from more than one angle of view, and an image processing unit ( 12 ) for utilizing the density information of the reference markers in the processing of X-ray image information.
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