This article will help you understand the CT scan protocol and how to prepare for it.
What Is a CT Scan?
Computed Tomography (CT) combines a series of X-ray images taken from different angles around your body and uses computer processing to create cross-sectional (slices) images of the bones, blood vessels, and soft tissues inside your body. CT images provide more detailed information than standard X-rays.
A special dye called contrast material may be needed for some CT scans to help highlight the areas of your body being examined. The contrast material blocks X-rays and appears white on the images, which can help emphasize blood vessels, intestines, or other structures.
Patients may receive the contrast material:
Orally: If examining the esophagus or stomach, the patient receives a liquid containing contrast material to drink.
Injection: The contrast agent may be injected through a vein in the arm to help the gallbladder, urinary tract, liver, or blood vessels stand out in the images.
Enema: The contrast material may be inserted into the rectum to help visualize the intestines. This procedure may cause the patient to feel bloated and uncomfortable.
When Is a CT Scan Needed?
CT scanning has many uses. A doctor may recommend a CT scan to help:
Examine internal inflammations, such as appendicitis and colitis.
Examine the urinary tract if stones are suspected.
Diagnose muscle and bone disorders, such as bone tumors and fractures.
Locate a tumor, infection, or blood clot.
Guide procedures such as surgery, biopsy, and radiation therapy.
Detect and monitor diseases and conditions like cancer, heart disease, lung nodules, and liver masses.
Monitor the effectiveness of certain treatments, such as cancer treatment.
Detect internal injuries and internal bleeding.
How to Prepare for a CT Scan?
Depending on which part of your body is being examined, you may be asked to:
Change your clothes and wear hospital attire.
Remove metal objects, such as belts, jewelry, dentures, and glasses, which might interfere with the image results.
Refrain from eating or drinking for several hours prior to the scan if required.
If your infant or child is undergoing a CT scan, the doctor may recommend a sedative to keep your child calm and still. Movement can blur the images and potentially lead to inaccurate results. Ask your doctor about how to prepare your child.
