Sonography, also commonly known as ultrasound, is a diagnostic medical examination that uses high-frequency sound waves to produce dynamic visual images of the fetus, heart, abdomen, pelvis, and blood vessels inside the human body. Sonography is also often referred to as a sonogram. After X-ray, sonography is the most used diagnostic imagining technique in the world. Sonography test help doctors and medical professional diagnose the size, shape, and density of internal body structure.