Computed Tomography (CT/CAT)

                                                                            

What is Computed Tomography?

CT (computed tomography), also called a CAT scan, uses x-ray and computer  equipment to produce cross-sectional images from of body tissues and organs. CT imaging is useful because it can show several types of tissue, such as lung, bone, soft tissue and blood vessels.

What are some common uses of CT?

• Studying the chest and abdomen.
• Diagnosing cancer. CT examinations are often used to:
  • Plan and properly administer radiation treatments for tumors.
  • Guide biopsies and other minimally invasive procedures.                           
  • Plan surgery.
  • Determine surgical respectability or follow up treatments.
• Diagnosing and treating spinal problems and injuries to the hands, feet and other skeletal structures.
• Measuring bone mineral density for the detection of osteoporosis.
• Identifying injuries to the liver, spleen, kidneys, or other internal organs.
• Detecting, diagnosing and treating vascular diseases that can lead to stroke, kidney failure, heart attack or even death.

How should I prepare for a CAT scan?

• On the day of your exam, wear comfortable, loose-fitting clothing.
• Avoid clothing with zippers and snaps as metal objects can affect the image.
• Depending on the part of the body that is being scanned, you may also be asked to remove hair pins, jewelry, eyeglasses, hearing aids and any dentures.
• You may be asked not to eat or drink anything for one or more hours before the exam.
• Women should inform their doctor or x-ray tech if there is any possibility that they may be pregnant.

What will I experience during the procedure?

CT scanning is painless. Depending on the type of scan you are having, your preparation may differ. To enhance the visibility of body tissue or blood vessels, different contrast materials may be administered by:

• Orally: You may be asked to swallow water or contrast material, a liquid that allows the radiologist to better see the stomach, small bowel and colon. Some patients find the taste of the contrast material slightly unpleasant, but tolerable.
• IV injection: To accentuate the appearance between normal and abnormal tissue in organs like the liver and spleen and to better define the blood vessels and kidneys, a contrast material is commonly injected into a vein. You might feel:
  • Flushed or have a metallic taste in your mouth. These are common reactions which disappear in a minute or two.
  • A mild itching sensation. If the itching persists or is accompanied by hives, it can be easily treated with medication.
  • In very rare cases, you may experience shortness of breath or swelling in the throat or other parts of the body. These can be indications of a more serious reaction to the contrast material. Your technologist should be notified immediately.

For more information on this topic, please visit  www.Radiologyinfo.org.