Diagnosis-Evaluation
Computed Tomography (CT) Scan.
The Ctscanner is a special X-ray machine which takes multiple pictures of the area to be scanned. A computer turns this scan into a three – dimensional view. This helps the doctor to find out problems that can’t be seen on regular X-rays. Conditions that can be detected by a CT scan are disc lesions, spinal
stenosis, tumours and infection of the spinal cord.
Only a few people with lower back pain need a CT scan. CT is often utilized in cases of trauma to evaluate the brain, chest, and abdomen. It can also be used to guide interventional procedures, such as biopsies and placement of drainage tubes.
A CT scanner is a large chamber that contains an X-ray tube for taking pictures. The patient has to lie on the scanning couch. Any metallic object on the patient, like watch, is removed. The patient is then slid into the scanner. The scanner takes multiple pictures. Information obtained during the scan is sent to a computer. The computer processes this information and produces rapid, detailed cross-sectional images of the patient which can then be reconstructed into three-dimensional models.
The patient should keep as still as possible during the procedure. He can breathe normally throughout the scan.
Sometimes a dye is injected into the patient. The dye acts as a contrast medium. It outlines the blood vessels, organs and tumours so that they can be seen more easily. When a dye is to be used for the scan, the patient is advised not to eat for at least three hours before the scan. Patient has to stop taking fluids one hour before the test. After the scan, the patient should drink plenty of fluids so as to eliminate the contrast medium from the body.
The radiologist should be informed if the patient is pregnant, diabetic, allergic to any foods or drugs and has had any previous side effects to a contrast medium from the body.
During pregnancy, an abdominal CT scan is usually not recommended, due to risk of radiation exposure to the
foetus.
