What is the role of OCT imaging in the workup of coronary artery atherosclerosis?

Updated: Apr 09, 2021
  • Author: Sandy N Shah, DO, MBA, FACC, FACP, FACOI; Chief Editor: Yasmine S Ali, MD, MSCI, FACC, FACP  more...
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Optical coherence tomography (OCT) imaging is a method of catheter-based, high-resolution intravascular imaging. Unlike IVUS, it measures the backreflection of infrared light rather than sound. The main advantage of OCT is its remarkable resolution, which is in the range of 10-20 µm. In addition, acquisition rates are near video speed, an advantage relative to many other technologies for assessing plaque. In contrast to IVUS scanning, the typical OCT catheters contain no transducers within their frame, which makes them small and inexpensive. Because OCT imaging uses light, a variety of spectroscopic techniques are available, including polarization spectroscopy, absorption spectroscopy, elastography, OCT Doppler, and dispersion analysis.

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