An upper gastrointestinal (GI) series is an imaging test of your esophagus, stomach, and the first part of your small intestine (duodenum). It is done with X-rays. Learn what to expect before, during, and after this test.

A sigmoidoscopy is a diagnostic test to check the lower part of your colon or large intestine (the sigmoid colon). This part of your colon is close to your rectum and anus.

A pancreas scan uses nuclear radiology to search for, and sometime treat, tumors in the pancreas.

Pleural biopsy is a procedure to remove a tissue sample from the pleura, the membrane that surrounds the lungs.

Pulse oximetry is a test used to measure the oxygen level (oxygen saturation) of the blood. It is an easy, painless measure of how well oxygen is being sent to parts of your body furthest from your heart, such as the arms and legs.

A lung transplant is surgery to remove a diseased lung and replace it with a healthy lung from another person.

A biopsy is a test done to remove a tissue sample from the body so it can be examined. A lung biopsy is a test to take a small piece of a lung.

A lobectomy is a surgery to remove 1 of the lobes of the lungs. Learn more about the procedure, such as why you might need one, what the risks are, and what to expect.

An abdominal X-ray may be done to check the area for causes of belly pain. It can also be done to find an object that has been swallowed or to look for a blockage or a hole in the intestine. Read on to learn what to expect before, during, and after this imaging test.

Abdominal ultrasound is an imaging test that uses sound waves to form pictures of your abdominal organs. It can help detect organ problems, such as gallstones, kidney stones, or liver disease.