Nuclear Medicine (bone sacn protocol ) A bone scan involves injecting a very small amount of radioactive material (radiotracer) into a vein. The substance travels through your blood to the bones and organs. As it wears off, it gives off a little bit of radiation. This radiation is detected by a camera that slowly scans your body. The camera takes pictures of how much radiotracer collects in the bones. If a bone scan is done to see if you have a bone infection, images may be taken shortly after t