Ultrasonography

Sonography redirects here. For the tactile alphabet called "sonography", see Night writing. Medical ultrasonography (sonography) is an ultrasound-based diagnostic imaging technique used to visualize muscles and internal organs, their size, structure and any pathological lesions, making them useful for scanning the organs. Obstetric sonography is commonly used during pregnancy. The choice of frequency is a trade-off between the image spatial resolution and the penetration depth into the pat ...