Vascular studies use ultrasound (sound wave) technology to assess the flow of blood in arteries and veins in the arms, legs, and neck.

Magnetic resonance imaging (MRI) is a test that uses a large magnet, radio signals, and a computer to make images of organs and tissue in the body. In this case, the heart is imaged. MRI may be used instead of a CT scan when organs or soft tissues are being studied.

Electromyography measures your muscle response or electrical activity in response to a nerve's stimulation of your muscle. The test is used to help detect neuromuscular abnormalities.

A cholecystectomy is surgery to remove your gallbladder.

Chest fluoroscopy is an imaging test that uses X-rays to look at how well your lungs are working. It can also look at other parts of your respiratory tract. Your respiratory tract includes your lungs, nose, throat, trachea, and bronchi.

A colostomy is an operation that creates an opening for the colon, or large intestine, through the abdomen. A colostomy may be temporary or permanent. It is usually done after bowel surgery or injury.

A urine flow test calculates the speed of urine flow over time. It may be used to check how the bladder and sphincter are working. Here's what you need to know about the test.

A sleep study is a number of tests done at the same time during sleep. The tests measure specific sleep characteristics and help to diagnose sleep disorders. Read on to learn what to expect.

A 24-hour urine collection is a simple lab test that measures what’s in your urine. The test is used to check kidney function. Here's what you need to know.

A cerebral arteriogram is a catheter-based exam of the blood vessels in the brain, head, and neck.