How is stenosis graded using coronary computed tomography angiography (CCTA)?

Updated: Dec 21, 2017
  • Author: Eugene C Lin, MD; Chief Editor: Eugene C Lin, MD  more...
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Answer

Answer

There are many different methods to grade the degree of stenosis, including the following:

  • Visual assessment

  • Manually determined diameter or cross-sectional area on multiplanar reformats perpendicular to the median centerline of the vessel ("end-on" view)

  • Diameter on maximum intensity projection (MIP) images parallel to the long axis of the vessel

  • Software calculation of diameter or area [8]


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