FREQUENCY DEPENDENT COMBINATION OF X RAY IMAGES OF DIFFERENT MODALITIES

摘要

The present invention relates to X ray imaging technology. In phase contrast imaging different types of image information e.g. absorption image information and differential phase contrast image information may be obtained by a single image acquisition process. Individual types of image information comprise different image properties. The present invention relates to a fre quency dependent combination of different types of image information to obtain a combined image having improved properties over the individual image information and their respective image information type. Accordingly an apparatus (56) as well as a method (100) for image processing in X ray imaging of an object is provided comprising receiving (102) first image information of the obje ct of a first image information type receiving (104) second image information of the object of a second image information typ e wherein the second image information type is different from the first image information type. Subsequently the first image information an d the second image information is combined(106)to obtain combined image information of the object wherein the combination of the first image information and the second image information is a frequency dependent combination depending on the spatial frequency of the first image information and the second image information.