Liver scan
Alternative names:
liver scan (Tc); liver technetium sulfur colloid scan; liver-spleen radionuclide scan; liver-spleen scan; nuclear scan - liver or spleen; nuclear scan - technetium; technetium scan
How the test is performed:
Technetium is injected into a vein. Remove any jewelry, dentures, or other objects that may interfere with the scan. After the liver has had sufficient time to absorb the technetium (about 20 minutes), you lie on a gantry (movable table) and are positioned under the scanner. Technetium emits gamma rays that are detected by the scanner and reproduced on a computer as a 3-dimensional image. As the liver takes up the technetium, any cancer deposits greater than 2 or 3 centimeters in diameter are "visible," because they appear whiter than the normal liver tissue. This is commonly referred to as a "cold spot."
The technician operating the camera and computer can manipulate the equipment to get a clearer picture. You are asked to remain still during the scan.
How to prepare for the test:
You must sign an informed consent form.
Remove jewelry and other metals because they can interfere with the scanner's functions. You may need to wear a hospital gown.
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 experience, 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:
When the technetium is injected, there will be a sharp prick or stinging from the needle. After the injection, there is no pain. The major discomfort is from the need to lie still during the scan; but if you are very tense, you may be given a mild sedative.
Why the test is performed:
This test is probably the best way to study the liver without surgery. It is particularly valuable because it can provide information about liver function. It is also used to help confirm other test results.
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