how do ultrasounds work?
A patient once said the ultrasound scanner looks like a small paint roller. I think this is an ideal description. As it moves back and forth over the body, the scanner sends sound waves through the skin and muscles. These waves are reflected back at various strengths from the different parts of the body which paints the picture you see. It is then turned into a 2D image that appears on a TV screen. The scan can then be put onto paper or CD for you to take with you.
