Like all Imaging techniques, which are non-invasive techniques, a doctor or technician uses Ultrasound to look inside the body and determine the nature of a problem on affected areas. These areas could be on the liver, heart, tendon, muscle, joints, blood vessels, kidney, abdomen or wherever else in the body. The difference is that Ultrasound imaging, also known as diagnostic sonography and ultrasonography, is a medical procedure using high frequency sound waves to create an image of parts of the body. The image created is called a Sonogram. Ultrasounds are used generally for diagnosis but there is also a type that can be used for treatment of benign tumors and it is called Therapeutic Ultrasound. Ultrasound refers to a sound frequency humans cannot hear. In medical diagnosis, the sound frequency used is between 2 and 18 MHz, which are very high frequencies and provide better quality images than low frequency sounds. Ultrasound scans are commonly used in obstetrics and has become a standard part of prenatal care. It is used to create images of the fetus in the uterus and can help assess problems or progress during the pregnancy. Ultrasound does not involve any ionization so it does not present as much risk as using X-rays or other form of ionization radiation but it still produces effects on the body because it involves a form of energy (sound) entering directly into the body. When this happens, the tissues get slightly heated and small pockets of gas are made in body fluids. There is an especial concern for exposing fetus to ultrasound because exposure of their developing tissues to heat energy can be bad for their development. Ultrasound scan of developing fetus is strongly discouraged unless it is for medical purposes. Under obstetrics, Ultrasounds are very accessible. An Ultrasound scanner should be available in most hospitals unlike MRIs that are usually...