2. Recurrent total opacification of the right middle ear and mastoid air cells, possibly on the basis of right eustachian tube dysfunction. Although osseous integrity of the skull base cannot be assured by MRI, it is noted that the mastoid air cell bony septae appear grossly intact. END OF IMPRESSION: UNENHANCED BRAIN CT: [**Date**] CLINICAL INDICATION: 11 year old s/p fall, with altered mental status and emesis TECHNIQUE: Contiguous 5 mm imaging from skull base to vertex without contrast administration. COMPARISON: None FINDINGS: The ventricular system and cortical sulci are within range for age.