Complex sentence: A medical ultrasound (also known as diagnostic sonography or ultrasonography) is an ultrasound-based diagnostic imaging technique used to see internal body structures such as tendons, muscles, joints, vessels and internal organs.
Split into simpler sentences: A medical ultrasound (also known as diagnostic sonography or ultrasonography) is an diagnostic imaging technique based on the application of ultrasound. It is used to see internal body structures such as tendons, muscles, joints, vessels and internal organs.