cerebral cortex, ventricle, choroid plexus, hypothalamus, pituitary gland, adenoma, meninges, subarachnoid space, ependymal cells, microhemorrhage, arterial stenosis,infarct, calcification, vascular malformation, tumor cell cluster, blood clot, meningeal cyst, glioma, astrocyte, oligodendrocyte, ependymal lining, cerebellum, pons, medulla oblongata, sphenoid bone, occipital horn