Ultrasound is most known for its use in OB/Gyn and to a lesser extent as lithotripsy in the treatment of kidney stones. These two applications of ultrasound historically exemplify its safety and power as a surgical tool. Modern ultrasound research and clinical use span a very large range of diseases. The most dominant features of diagnostic ultrasound are the ability to monitor anatomical structures (such as heart, kidney, liver, etc.) and the use of Doppler to visualize blood/fluid flow inside the body in real-time without adverse effects.