Look at the neuro images in HY Neuroanatomy and/or whatever you used as your course neuroanatomy text. That probably would've helped me (I had maybe 3 or 4 neuroanatomy questions with imaging).
Head MRI/CT is all that you might see. I remember probably 5-7 questions with pictures of these type of images. Also recognize the sunburst pattern on X-ray and those radiographic images that are found in First Aid are also high yield. Besides this, you should be covered being aloof in the rads realm.