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This is a test to look for any areas of bone where there is a lot of bone building activity.
There are several possible reasons for bone activity - cancer is one of them, but other reasons include arthritis, fractures and bone infections, so the test results need to be carefully interpreted.
For the test, a mildly radioactive substance is injected into a vein in the arm. Then a large machine called a gamma camera takes a scan of the body. The radioactive substance helps to show up any active areas of bone – these are called hot spots.
