pneumoencephalogram
/ˌnumoʊɛnˈsɛfələˌɡræm/
noun
- A medical imaging test, now rarely used, in which air is injected into the fluid-filled spaces of the brain to make them show up on X-rays.
- The pneumoencephalogram was a painful procedure that often caused headaches.
- Today, a pneumoencephalogram has been replaced by safer methods like MRI and CT scans.
- Before modern scans, doctors used a pneumoencephalogram to look for brain tumors.