1. A method for analysis of a multi-dimensional structure which includes a tubular structure from two-dimensional datasets for respective pre-determined projection directions, the method comprising the steps of identifying at least one pair of corresponding initial projected centre points of the tubular structure in two respective initial two-dimensional datasets, identifying at least one further projected centre point corresponding to said initial projected centre points in at least one further two-dimensional dataset, derive a three-dimensional spatial position of the centre point of the tubular structure corresponding to said projected centre points, identify projected edges of the tubular structure in said initial two-dimensional datasets and in said further two-dimensional dataset near the respective projected centre points and derive a local size of the tubular structure at the three-dimensional spatial position of the centre point of the tubular structure from said projected edges and the predetermined projection directions.