I think that's normal to add CT scan as well as a bone scan. My Dr tries to get a PET scan because that scan tells everything. If I don't get that one then a CT and Bone scan is ordered which is the next step down. I had a unilateral mastectomy 6 weeks ago and I just had my CT and Bone scan a few days ago. The CT is normally chest and abdomen and the bone scan is head to toe.