Head CT is done in the hospital or radiology center.
You lie on a narrow table that slides into the center of the CT scanner.
While inside the scanner, the machine's x-ray beam rotates around you.
A computer creates separate images of the body area, called slices. These images can be:
- Viewed on a monitor
- Printed on film
Three-dimensional models of the head area can be created by stacking the slices together.
You must be still during the exam, because movement causes blurred images. You may be told to hold your breath for short periods.
Complete scans usually take only 30 seconds to a few minutes.