X-rays
	CAT Scan
	MRI
	Myelogram
	Bone Scan
	DEXA Scan
	EMG

What is it?
A bone scan is a test used to capture images of the entire skeletal system. A small amount of radioactive material, commonly referred to as a tracer, is injected into the bloodstream. Over time, this material is absorbed by the bone and concentrates in those areas of the skeletal system that are abnormally active.

Why is it done?
Doctors typically order a patient to have a bone scan when they are unable to pinpoint the exact location or origin of the patient's particular skeletal condition. Oftentimes, patients report symptoms, but the source or origin cannot be determined based on their accounts. Bone scans can be helpful in revealing tumors, compression fractures, infections, and in determining bone density and bone thinning with the onset of osteoporosis.

What does it involve?
The patient is given an IV through which the tracer is introduced into their bloodstream. A series of images are produced, the first of which is taken within a few minutes of the tracer being introduced through the IV. The final scan is usually done a few hours later. At this point, the radioactive material in the tracer has absorbed into the bone and, more importantly, has had enough time to settle into those areas of bone where there is irregular activity. The film used to capture the images is sensitive to the radioactive gamma rays given off from these areas and clearly show darker areas of bone or hotspots, as they are called. To determine what type of activity may be occurring, the doctor then evaluates these areas further.

How should I prepare for it?
Because a bone scan is a non-invasive test, it does not require much preparation on the part of the patient. You may be asked to change into a hospital gown and to remove any jewelry or piercings, since these objects can cause irregularities in the images. You should also set aside ample time for the test. In some cases, images are taken several hours after the tracer material has been introduced into the bloodstream. It is important to note that infection and bleeding are potential complications with any intravenous injection. Radiation exposure can pose a serious threat to a developing fetus. Before receiving a bone scan, inform your doctor if you are pregnant (or even suspect that you are).

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