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FIG 1. Age-related expansion in sphenoid aeration. Midsagittal reformatted images of 1.0-mm (A—C) or 1.5-mm (D) slice thickness obtained from helical CT data scanning with a collimation of 1 or 3 mm.
A, One-year-old boy shows no aeration of sphenoid bone.
B-D, Further expansions of sphenoid aeration to posterior and superior directions in a 5-year-old boy (B), 19-year-old man (C), and 29-year-old woman (D). Note closure of spheno-occipital suture in 19-year-old man (C).
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