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Sonographers are diagnostic medial professionals who operate ultrasonic imaging devices to produce diagnostic images, scans, videos, or 3-D volumes of anatomy and diagnostic data. A sonographer is trained to discriminate between healthy and diseased areas. They bring any suspected abnormalities to the attention of a physician for a diagnosis.

Sonography requires specialized education and skills to view, analyze and modify the scan to optimize the information in the image. Sonographers must understand ultrasound physics, cross-sectional anatomy, physiology, pathology and have strong communication skills.

The American Registry for Diagnostic Medical Sonography (ARDS) is the professional organization that oversees the credentialing of sonographers, who must pass an examination to earn registration. Those who pass are certified as a Registered Diagnostic Medical Sonographer (RDMS). Additional specialty credentials are also available through ARDMS.