Intravascular Ultrasound

Intravascular Ultrasound (IVUS) is an imaging technique which uses ultrasound waves to generate images on a computer screen. The ultrasound probe is located at the tip of a catheter, which is inserted into the coronary artery to image inside the blood vessel. A wide variety of information can be obtained from this procedure including the length and diameter of a narrowed segment in the artery, the volume of plaque (plaque burden), the type of blockage present and whether or not calcium is present in the vessel wall. IVUS can also be used to determine the size of the stent to be implanted and to optimize the procedure. In contrast to OCT, no contrast injection is required to clear the blood during this procedure.