Figure 15.

The upper panel (A,B) demonstrates ⁶⁷Ga and ^99mTc MDP SPECT/CT scans in a patient being evaluated for acute malignant otitis externa. While ^99mTc MPD SPECT/CT shows uptake in the bones of the central skull base (white arrowhead), consistent with osteomyelitis, the ⁶⁷Ga also demonstrates soft tissue infection at the central skull base and around the external auditory canals. The lower panel (C,D) is of a different patient with continued pain following completion of an antibiotic regimen for skull base osteomyelitis. The ^99mTc MDP SPECT/CT (right lower panel) shows post-infectious remodeling hyperostosis of the bones of the central skull base, but the ⁶⁷Ga SPECT/CT (left lower panel) shows an absence of active infection.