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.
It's also used to view the inner ear and sinuses because these areas are made of very fine bones. Figure 1. A, CT scan of the head showing a hematoma caused by an injury to the back of the skull during a car accident. B, CT scan of the spine showing spinal stenosis and a disc fragment in the spinal canal.