sound, or sonography, is a
simple, safe and painless procedure. Ultrasound images, are
produced by bouncing high
frequency sound waves off different parts of the body to form an
is also used to take a closer look at tumors and cysts,
as ultrasound can provide information that conventional
x-ray cannot. In most ultrasound examinations, a
hand-held transducer is placed
on the patient's skin, displaying a two-dimensional
image on a video screen.
can also be used to capture a range of moving images, while images of blood
moving through veins and arteries can be captured using
ultrasound enhanced with a special Doppler technique.