This test shows up abnormal areas of bone. You have a small amount of radioactive substance injected into a vein. You will need to wait for two to three hours between having the injection and the scan. The scan may take an hour. Abnormal bone absorbs more radioactivity than normal bone and shows up on the scan pictures.
The amount of radioactive substance used is small. But you will be advised not to have close contact with pregnant women, babies and young children for up to 24 hours after the scan. After this, your body will have got rid of the radioactivity in your urine. If you are pregnant or breastfeeding, it’s important to phone the scanning department before the test for advice.
If you are travelling through an airport in the days following your scan, you could take your appointment letter with you. Some airport scanners may detect the small amounts of radiation in your body.