| 摘要 |
The invention relates to a method for navigating in the interior of the body using three-dimensionally visualised structures. In a first step of this method, at least two two-dimensional images (50, 50') of the same anatomical object (12) from different perspectives and information enabling the respective spatial position of an imaging system in relation to the anatomical object (12) to be determined are provided. The projections (76, 76', 78, 78') of a geometrical structure (80, 82) to be visualised are then determined in each two-dimensional image (50, 50'), the geometrical structure (80, 82) to be visualised being different from the anatomical object (12). A conical surface (40, 40') is then generated in space for each image (50, 50'), the spatial positions of the tip of the cone (46, 46') and the guiding curve of the cone being determined from the respective spatial position of the imaging system and the shape of the guiding curve of the cone being determined from the shape of the projection (76, 76', 78, 78') of the geometrical structure (80, 82) to be visualised on the image (50, 50'). A spatial section of the individual conical surfaces (40, 40') is finally made in order to determine the geometrical structure (80, 82) and the geometrical structure (80, 82) that is determined and/or a section of several geometrical structures (80, 82) determined is represented and this representation is used for navigating. |
