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. 2003 Jun;24(6):1159–1163.

Fig 4.

Fig 4.

Patient 4.

A, Axial spin-echo T1-weighted image (500/20 [TR/TE]; number of signals averaged [NSA], 2256 × 224; section thickness, 5 mm) shows enlargement of the right masseter muscle with a subjacent curvilinear collection of low signal intensity believed to represent pus.

B, Axial fast spin-echo T2-weighted image (7100/125; NSA, 2; matrix, 256 × 224; section thickness, 5 mm) shows an elliptical mild high signal intensity zone lateral to the mandible corresponding to the low signal intensity seen on the T1 image and consistent with pus. Higher signal intensity between this collection and the masseter muscle probably represents edema and myositis.

C, Coronal spin-echo T1-weighted image (450/20; NSA, 2; matrix, 256 × 256; section thickness, 5 mm) shows thickening of the right mandibular ramus with low signal intensity within the marrow cavity consistent with cortical thickening and sclerosis of the marrow space.