| 摘要 |
A method is disclosed for mathematically generating a virtual catheter in tomographic volume data in which the virtual catheter is assembled from a multiplicity of catheter segments, each of which being separately describable in a closed mathematical expression and each being approximated to the measured volume data by error calculation and variation of their parameters. In at least one embodiment, transition criteria between the surfaces and the center lines of the virtual segments which create smooth transitions, and thus already predetermine a multiplicity of parameters of the segment following in each case, are used in order to reduce the parameters to be adapted. The description of the envelope of the segments and of the center line of the segments by way of second-degree polynomials is particularly suitable for representation in a mathematically closed form. In addition, in another embodiment, a tomography system is disclosed for carrying out an embodiment of the method and a storage medium with program code is disclosed, for an embodiment of the method.
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