Automatic Tube Current Modulation was used to further limit radiation exposure in appropriate cases. The specific exposure techniques are recorded in the Scan Protocol which is available in the hospital PACS. COMPARISON: CT temporal bones [**Date**], as well as MRI temporal bones [**Date**] [**Date**] FINDINGS: There is no significant change when compared to the prior CT and MRI examinations On the right side, the external auditory canal is patent. There remains complete opacification of the middle ear, aditus ad antrum, and mastoid air cells, stable from the prior studies. Expansile opacification of the petrous apex, consistent with the patient's history of cholesterol granulomas, is unchanged.