| 摘要 |
An arrangement and a method for maximum intensity projection of a three-dimensional scene on a two dimensional display (11), via the calculation of first or higher-order interpolated values of points (P1, ..., Pm) along rays (61) casted through a voxel representation (50) of said scene, is improved in speed. The improvement is achieved by, firstly, determining an estimated minimum value for the ray (61) under consideration and for each sample point (Pk) an estimated maximum value for the interpolated value. Only if the estimated maximum value for a point exceeds the estimated minimum value for the ray (61), an interpolation is required. Both estimated extremes are obtained by comparing the values contributing to the interpolations, the estimated minimum value by an analogue procedure or by reference to a neighbouring ray. <IMAGE> |
