The invention relates to a system and a method for indicating at least one of the internal structures of an organ on an X-ray image, wherein the system comprises an interface adapted to receive the an X-ray image and a non- X-ray image pertaining to the organ, a database comprising a geometric model of the internal structures of the organ, a first module for determining at least a dimension of one of the internal structures of the organ from the non- X-ray image, and a second module for indicating the at least one of the internal structures of the organ in the X-ray image based on the geometric model adjusted by the at least one dimension.
