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Figure 7b. AVN of the talus in a 42-year-old man who was involved in a serious motor vehicle accident. (a) Axial CT scan through the talus shows diffuse sclerosis involving the majority of the talus (white arrows), with focal sparing of the lateral talar dome (black arrow). (b) Axial fat-saturated T2-weighted MR image shows diffuse high signal intensity in the majority of the talus. The lateral talar dome demonstrates normal bone marrow signal intensity (arrowheads), a finding that corresponds to the normal region seen at CT.
