1. A method for generating an image, comprising: a) obtaining 3D rotational angiography (3DRA) data set(s) for an anatomical structure; b) obtaining diagnostic data set(s) for an anatomical region; c) combining the 3DRA data set(s) and the diagnostic data set(s); and d) generating an image that includes a slab derived from the diagnostic data set(s) and the anatomical structure derived from the 3DRA data set(s); wherein the image of the anatomical structure includes a silhouette view of a portion of the anatomical structure that is obscured by the slab.