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A myelogram uses X-rays and a special dye called contrast material to make pictures of the bones and the fluid-filled space

Thoracentesis (say "thor-uh-sen-TEE-sis") is a procedure to remove fluid from the space between the lungs and the chest wall. This

A computed tomography (CT) scan uses X-rays to make detailed pictures of structures inside of the body. During the test, you will

A salivary gland scan uses a special camera and a tracer (radioactive chemical) to take pictures of the salivary glands. This can

Discusses why and how skin biopsies are done. Covers preparing for surgery and post-surgery risks. Explains how to interpret

Covers exercise stress test, also called treadmill test or exercise EKG. Explains why it's done, such as finding cause of angina

A cardiac perfusion scan measures the amount of blood in your heart muscle at rest and after it has been stressed. It is often

A thyroid biopsy is a procedure in which a small sample of tissue is removed from the thyroid gland and looked at under a

Discusses test that uses X-rays to find problems in the esophagus, stomach, and small intestine. Covers why and how it is done

A viral test is done to find infection-causing viruses. Viruses grow only in living cells. Viruses cause disease by destroying or