Definition of Liver scan:

A liver scan uses a radioactive material to help determine how well the liver or spleen is working.

How the test is performed:

The health care provider will inject a radioactive material called a radioisotope into one of your veins. After the liver has soaked up the material, you will be asked to lie on a table under the scanner.

The scanner can tell where the radioactive material has gathered in the body. Images are displayed on a computer. You may be asked to remain still, or to change positions during the scan.

How to prepare for the test:

You must sign a consent form. You will be asked to remove jewelry, dentures, and other metals because they can interfere with the scanner's functions.

You may need to wear a hospital gown.

How the test will feel:

You will feel a sharp prick when the needle with the radioactive substance is inserted into your vein. You shouldn' t feel anything during the actual scan. If you have difficulty lying still or are very anxious, you may be given a mild sedative to help you relax.

Why the test is performed:

The test can provide information about liver and spleen function. It is also used to help confirm other test results.

Currently, the most common use for a liver scan is to diagnose a condition called benign focal nodular hyperplasia, or FNH.