Abdominal CT scan

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		Liver cirrhosis, CT scan	Liver metastases, CT scan
Lymph node metastases, CT scan	Lymphoma, malignant - CT scan	Neuroblastoma in the liver - CT scan	Normal external abdomen
Pancreatic, cystic adenoma - CT scan	Pancreatic cancer, CT scan	Pancreatic pseudocyst, CT scan	Peritoneal and ovarian cancer, CT scan
Spleen metastasis - CT scan

An abdominal CT scan is an imaging method that uses x-rays to create cross-sectional pictures of the belly area. CT stands for computed tomography.

See also: CT scan

Computed tomography scan - abdomen; CT scan - abdomen; CAT scan - abdomen

You will be asked to lie on a narrow table that slides into the center of the CT scanner. Usually, you will lie on your back with your arms raised above the head.

Once you are inside the scanner, the machine's x-ray beam rotates around you. (Modern "spiral" scanners can perform the exam without stopping.)

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A computer creates separate images of the belly area, called slices. These images can be stored, viewed on a monitor, or printed on film. Three-dimensional models of the belly area can be created by stacking the slices together.

You must be still during the exam, because movement causes blurred images. You may be told to hold your breath for short periods of time.

The scan should takes less then 30 minutes.

Certain exams require a special dye, called contrast, to be delivered into the body before the test starts. Contrast helps certain areas show up better on the x-rays.

• Contrast can be given through a vein (IV) in your hand or forearm. If contrast is used, you may also be asked not to eat or drink anything for 4-6 hours before the test.
• Let your doctor know if you have ever had a reaction to contrast. You may need to take medications before the test in order to safely receive this substance.
• Before receiving the contrast, tell your health care provider if you take the diabetes medication metformin (Glucophage) because you may need to take extra precautions.

If you weigh more than 300 pounds, find out if the CT machine has a weight limit. Too much weight can cause damage to the scanner's working parts.

You will be asked to remove jewelry and wear a hospital gown during the study.

Some people may have discomfort from lying on the hard table.