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Midline (A) and parasagittal (B) non-contrast-enhanced T1-weighted MR images (500/11/1) in a 73-year-old healthy woman show the normal high signal intensity of the diploic space due to fat, the major constituent of adult marrow. The mild heterogeneity and thickening of the diploic space is common in older patients. Also note the normal appearance of the clivus in A, which, in this case, is homogeneously hyperintense.
