Sagittal T1-weighted MRI. frontal lobe (1), parietal lobe (2), occipital lobe (3), corpus callosum (4), lateral ventricle (5), thalamus (6), midbrain (7), pons (8), medulla oblongata (9), cerebellum (10), spinal cord (11), adenohypophysis (12), and neurohypophysis (13). Sagittal T1-weighted MRI shows the posterior pituitary lobe. The adenohypophysis is isointense relative to gray matter and the neurohypophysis is hyperintense. Scale bar represents 1 cm.