A bone scan is a diagnostic test to identify lesions (abnormalities) in your bones. It is an imaging test using radiotracer (a radioactive material), which is injected into a vein. A camera scans your body and creates images that indicate where the radiotracer collected in your bones.
Purpose
The purpose of a bone scan is to identify lesions, such as fractures, bone tumors, arthritis, impaired bone blood supply, fibrous dysplasia or infection (osteomyelitis). It may also be performed to identify cancer that has spread to your bones. You may have a scan of your entire body or you the test may only be done on part of your body.
Preparation
In preparation for the scan, you will receive an injection of radiotracer. It can take between one and four hours for the radiotracer to completely circulate through your body. You can expect to drink a lot of water while you are waiting. This flushes out the excess radiotracer that has not been absorbed by your bones. You must remove all jewelry and any other metal objects before the scan. You may need to wear a hospital gown.
Procedure
The scan is performed with you lying on your back on an exam table, while the camera moves around you. The camera detects the areas of radiation (indicating lesions) and captures the images. It is important to remain still to prevent blurry images. You may be asked to change positions during the scan. The procedure can take between 30 and 60 minutes. Some bone scans are done in three phases, with images being taken at three separate intervals as the radiotracer moves through your body.
Risks
You are given a very small amount of radiation for the scan and most of it has passed through your body within two to three days. Although rare, the risks associated with the radiotracer include a severe allergic reaction, swelling and rash. However, most people do not have any side effects from it. You may have to delay the scan if you are pregnant and nursing because of the dangers of exposing your baby to the radiation.
Considerations
Before having a bone scan, you need to inform your doctor of any other medical conditions you have and all medications that you are currently taking, including over-the-counter and supplements. Certain medications can have an effect on the results of your scan, such as those that contain bismuth or barium. You should also tell him if you have any drug allergies. You can plan to resume your normal activities following the test.
Tags: your body, your bones, bone scan, through your, through your body, identify lesions, scan need