Sign in  |  Register

Illustrated Health Encyclopedia
[an error occurred while processing this directive]

Ency. home > Test > A > Abdominal CT scan

Abdominal CT scan    See images

Overview | Risks | Results

Alternative names:

Helical or Spiral CT of the abdomen and pelvis

Definition:

A CT scan X-rays the body from many angles. The X-ray beams are detected by the scanner and analyzed by a computer. The computer reconstructs the data into a picture of the body area being scanned. These images can be viewed on a monitor or reproduced as photographs.

How the Test is Performed

The CT scanner is a free standing machine with a large hole in the center. The patient lies on a narrow table which slides into the hole. In most cases the patient will be on his back with his arms raised above his head. Patients who have difficulty with enclosed spaces such as those found with some MRI scanners do not usually have a problem with this type of test. A dye may be injected into a peripheral vein to better evaluate certain diseases and organs. The radiologist will decide if this is necessary. Please tell the technician or radiologist if you have any allergies or have had difficults with prior CT examinations. It is very important that the patient remains still throughout the exam and holds his breath when asked. This will allow for better images. The actual scan time is usually about two minutes although the entive procedure usually takes much longer.

How to Prepare for the Test

The health care provider may advise fasting for 4 to 6 hours if contrast dye is to be used or if sedation is anticipated (consult the health care provider).

The patient wears a hospital gown during the procedure. The patient may need to sign a consent form.

Infants and children:
The physical and psychological preparation you can provide for this or any test or procedure depends on your child's age, interests, previous experiences, and level of trust. For specific information regarding how you can prepare your child, see the following topics as they correspond to your child's age:

How the Test will Feel

The X-rays are painless. The primary discomfort may be from the need to lie still on the table.

If a dye is needed to increase the contrast between different tissues or organs, it is administered by injection into a vein. The injection may sting and the site may be tender to the touch for several minutes. Dye injections may cause a warm sensation, a metallic taste and, in a few cases, hives. Very rarely more severe contrast reactions can occur.

Why the Test is Performed

An abdominal CT is a non-invasive way a physician can evaluate the patient's internal organs and tissues. The indications for the test are many and a full description is beyond the scope of this article. Some more commone uses ar for the evaluation of tumors, infections, renal stones or appendicitis.

Ency. home > Test > A > Abdominal CT scan

[an error occurred while processing this directive]