�"brain hemisphere, tumor-like lesion, blood vessels, ventricle, aqueduct of Sylvius, lymph nodes, microcalcifications, endotracheal tube, breathing mask, scalp, skull cap, sutures, meninges, cerebral cortex, gyri, fissures, artery, vein, capillaries, nerve fibers, optic nerve, temporal bone, parietal bone, occipital lobe, frontal lobe