Magnetic resonance imaging mesencephalic tectum dimensions according to age and gender.

Objective: To analyze and classify normal MRI tectum length and colliculus dimensions according to age and gender.

Methods: Tectum length and colliculus diameters were measured on the T1 midsagittal and axial cranial MR images in the radiology archive of 532 (344 women, 188 men) patients aged 37.36+/-21.