This cross-sectional imaging technology allows the radiologist to look at different levels or slices of the lower back using a rotating X-ray beam. The radiologist is able to view each slice to assess for injuries, including ruptured disks and other bony abnormalities.
The exam may include injecting an iodine substance in the vein. Diabetic patients and those with allergies must inform the radiology staff and may need clearance from their doctor before the exam. Blood tests may also be required prior to the administration of contrast materials. Patients whose exam includes an injection may not eat or drink anything four hours before the test. During the injection the patient may experience a warm sensation throughout the body and a metal taste in the mouth. This is normal.
For the exam, patients lie on their backs with arms positioned above the head. A portion of the body is covered by the scanner, but the scanner is open at the back and the front, allowing the patient to see out. The technologist is always able to see and hear the patient during the 15- to 30-minute exam.
