A barium enema is an imaging test that uses X-rays to look at your lower gastrointestinal (GI) tract. Your lower GI tract includes the large intestine (colon) and rectum.

A barium swallow is an imaging test that uses X-rays to look at your upper gastrointestinal (GI) tract. Your upper GI tract includes the back of your mouth and throat (pharynx) and your esophagus.

A bone biopsy is a procedure done to remove tissue or cells from the body to be looked at under a microscope.

A bone density test is used to measure the bone mineral content and density. It may be done using X-rays, dual-energy X-ray absorptiometry (DEXA or DXA), or a special CT scan that uses computer software to determine bone density of the hip or spine.

A bone marrow biopsy involves removing a small sample of the bone marrow inside your bones for testing. Read on to learn what to expect before, during, and after this procedure.

A bone scan is an imaging test used to look at the skeleton. It is done to find areas of physical and chemical changes in bone. A bone scan may also be used to see if treatment of certain conditions is working.

A breast biopsy is a small piece of breast tissue that is removed and checked in a lab. This is done to see if cancer or other abnormal cells are present.

Magnetic resonance imaging creates detailed images of the body using large magnets and a computer. For breast MRI, a woman will lie face down with her breasts positioned through holes in a table.

A breast scan is an imaging test to look at your breasts. It is used when a mammogram has not given your health care provider enough information.

Breast ultrasound is an imaging test that uses sound waves to look at your breasts. It can help your healthcare provider find breast problems. It also lets your provider see how well blood is flowing to areas in your breasts. This test is often used along with mammography.

Bronchoscopy is a procedure to look directly at the airways in the lungs through a thin, lighted tube (bronchoscope).

Bunion surgery is done to reduce the pain and correct the deformity caused by a bunion. A bunion is an enlargement of the bone or tissue around a joint at the base of the big toe or at the base of the little toe. Read on for details about this surgery.