Normal Internal Auditory Canal Size on CT and MRI
Normal internal auditory canal diameter measures 4–8 mm on axial CT and MRI; values below 2 mm indicate stenosis with clinical significance.
Internal Ear
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Normal Vestibular Aqueduct Canal Size: CT Reference
Normal vestibular aqueduct canal diameter is less than 1.5 mm on CT; values at or above this threshold suggest enlargement and inner ear pathology.
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