Intravascular ultrasound (IVUS) utilizes a catheter that has a miniature ultrasound transducer mounted at the tip. The catheter is placed inside the lumen of a coronary or peripheral vessel. An ultrasound image of the inside of the vessel can now be recorded and reviewed. The images can allow physicians to measure the inner dimensions of a vessel and determine if interventional devices are optimally deployed. IVUS can also allow visualization of plaque morphology, location, and size. This information helps physicians to determine appropriate therapy and assessment of results following a percutaneous coronary intervention (PCI) or a peripheral vascular intervention.