| 摘要 |
A data processing method, performed by a computer (2), for determining a transformation between two medical images of an anatomical structure (L), respectively taken at a first and second point in time, said method comprising the steps of: a) acquiring first and second image datasets which represent the first and second image, respectively; b) determining an image-based transformation (V) between the first image and the second image; c) acquiring an elastic model of the anatomical structure (L) at the first point in time, wherein the elastic model comprises a plurality of nodes (N1-N4) and the relationships between the nodes (N1-N4); d) calculating the displacements of a subset of the nodes (N1) in accordance with the image-based transformation; e) calculating the displacements of the other nodes (N2-N4) in accordance with the relationships between the nodes (N1-N4) as represented by the elastic model,while keeping the displacements of the nodes in the subset of nodes (N1) constant; and f) calculating the transformation from the displacement vectors which represent the displacements of the nodes (N1-N4) as compared to their positions at the first point in time. |
