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Wavy lines mean ultrasound waves. During amniocentesis, amniotic fluid is drawn from the uterus.

Curved lines represent ultrasound waves.

Source: NCI Visuals Online. Skin Cancer Foundation. www.cancer.gov. The ABCDEs of melanoma skin cancer are: Asymmetry. One half

Retinal imaging uses special cameras and scanners to make magnified images, or pictures, of the back of your eye. This includes

Looks at assessments done to discover problems like depression, schizophrenia, Alzheimer's disease, learning disabilities, or

Beta-blocker medicines are used to prevent an episode of variceal bleeding by lowering the pressure in the enlarged veins (varices

Discusses complete physical exam of a woman's pelvic organs by a health professional. Includes info on exam of vagina, cervix

Positron emission tomography (PET) is a test that uses a special type of camera and a tracer (radioactive substance) to look at

Describes various sleep studies used to diagnose sleep disorders. Discusses problems like snoring, sleep apnea, insomnia, and

Discusses stool analysis, a test used to look for bacteria, parasites, or blood in the digestive tract. Covers why and how it is