Contemporary definitions for backdraft. noun. a sweep of air backwards; also, a condition in a fire where oxygen is depleted and the fire dies down until a door is opened and the fire flares violently from the intake of oxygen.
CT Internal Auditory Canal. CT Scan of the Internal Auditory Canal. A computed tomography scan (CT or CAT) of the internal auditory canal, also called cross-sectional imaging, allows the radiologist to look at different levels, or slices, of the skull bones leading from the ear using a rotating X-ray beam.
You may need any of the following tests: 1  A hearing test measures how well you hear sounds and words. 2  A CT , or CAT scan, is a type of x-ray that is taken of your head to see the bones of your inner ear. 3  An MRI takes pictures of the nerves in your inner ear and brain.