| 主权项 |
1. A dental computed tomography apparatus, which apparatus includes
a support construction (11, 13) for supporting a structure arranged turnable and supporting imaging means (14), at least one imaging station (18) for placing a patient to the apparatus for imaging, in which apparatus the imaging means includes at least an x-ray source (15) and a means for receiving x-ray image information (21), which have been arranged in the apparatus in such a way with respect to said imaging station (18) that the x-ray source (15) and the means for receiving x-ray image information (21) can be positioned at opposite sides of the imaging station (18) such that a beam generated by the x-ray source (15) can be aligned to go through said imaging station (18) and towards said means for receiving x-ray image information (21), a control system for controlling operations of the apparatus and a means integrated with the apparatus or arranged into functional connection with it for processing information detected at the receiver of x-ray image information (21), characterized in that characterized in that the apparatus includes a means for photographing (22) a patient's face and/or for producing a moving picture of the patient's face from at least two directions while the patient is positioned at said imaging station (18), which means for photographing or producing a moving picture comprises at least one colour camera (22) being arranged into connection with said rotating support structure (11) such that the location of the at least one colour camera with respect to said imaging station is arranged changeable or which means for photographing comprises at least two colour cameras located horizontally at a distance from each other to image the patient's face positioned at the patient support station (18) from different directions, at least two lasers (24) or other light sources producing a light pattern, said at least two lasers or other light sources arranged to the apparatus with respect to the imaging station (18) such that the upper of them illuminates the patient's face at least slightly obliquely from above and the lower at least slightly obliquely from below when the patient is positioned at the imaging station (18), and a means arranged into functional connection with said at least one colour camera (22) for creating a virtual three-dimensional surface model of the light-pattern information directed at different locations on the face of the patient positioned at the imaging station (18) and a means for combining the face image information detected by said at least one colour camera (22) to said surface model of the patient's face to create a virtual three-dimensional texture model of the patient's face. |
