Ultrasound is a technique of using high-frequency sound waves to capture live images from the interior of the body. Sonography is another name for it. You must have heard of sonar or radar technology, where sound waves are reflected by obstacles, which gives information about the objects. The same happens during Ultrasound Sonography (USG) Scan Lab test. The ultrasound allows the doctors to see the organs, tissues and vessels and check if there are problems with them. The best part is that no incision is required for this process. Since there are no radiations involved, this technique is widely preferred.