| 20100296716 | TOMOGRAMS FOR IMPLANT PLANNING - Method for creating and presenting layer images that are generated from a set of volume data, whereby the volume data are recorded with a tomographic recording device, for example with a “cone beam CT” device, and show the jaw area of a patient, whereby planning data are assigned to the volume data, and said planning data describe the position of an implant that is to be inserted into the jaw and that has an implant axis, whereby a coordinate system that is adapted to a panoramic curve or a panoramic surface is defined that is formed by the vectors u, v, and w that are orthogonal to one another, whereby for the creation and presentation of a layer image, a representational plane is selected that intersects an implant that is described by the planning data, whereby in a first case, the v vector is orthogonal to the panoramic surface and/or the panoramic curve, and the implant axis intersects in a reference point, whereby the reference point is selected as the origin of the coordinate system, whereby the w-vector that runs through the reference point is tilted in such a way that the implant axis lies in the v, w-plane, whereby the v, w-plane forms a first base plane and whereby a representational plane that is parallel to the first base plane is selected, whereby in a second case, the u vector intersects the implant axis in a reference point and is parallel to the tangent on the panoramic curve in the perpendicular point of the reference point to the panoramic curve, whereby the w-vector of the coordinate system is tilted in such a way that the implant axis lies in the u, w-plane, whereby the u, w-plane forms a second base plane and whereby a representational plane that is parallel to the second base plane is selected. | 11-25-2010 |
| 20100124367 | IMAGE REGISTRATION - Disclosed is a method for defining a common reference system in a record of volume data that represents an area of a patient's jaw and is captured by means of an X-ray imaging process and a record of surface data, at least some of which represents the same area of the patient's jaw and which is captured by means of a process for measuring visible surfaces. Volume data and surface data are unhidden on a screen. An object, especially a tooth, which is recognizable in both the volume data and the surface data, is superimposed on each other as congruently as possible in a preliminary positioning step. A volume structure characterizing the object is extracted from the volume data, particularly as a type of edge image, and is made to overlap as much as possible with a corresponding surface structure of the surface data by means of a transformation function, the overlap of the volume structure being adjusted to the surface structure in iterative steps by optimizing a predefined quality level. | 05-20-2010 |
