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Ultrasonography, commonly called sonography, is a diagnostic medical procedure that uses high frequency sound waves (ultrasound) to produce dynamic visual images of organs, tissues, or blood flow inside the body. This type of procedure is often referred to as a sonogram or ultrasound scan. Sonographers examine many parts of the body, such as the abdomen, breasts, female reproductive system, prostate, heart, and blood vessels. They are involved in the detection and treatment of heart disease, heart attack, and vascular disease that can lead to stroke. Sonography is also used to guide fine needle, tissue biopsy to assist in taking a sample of cells from an organ for lab testing (for example, a test for cancer in breast tissue). Unlike x-ray, sonography is a radiation-free imaging modality.
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