What are artifacts of 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

Artifacts include the following:

  • Stairstep artifacts: Associated with heart rate variability [4] (see the image below)

  • Stairstep artifact: Volume-rendered CT image demon Stairstep artifact: Volume-rendered CT image demonstrates "stairstep" artifact. This is a phase-misregistration artifact that is typically secondary to an irregular heartbeat.
  • Coronary artery motion artifacts: Result in image blurring (see the image below)

  • Coronary artery motion: Axial CT images reconstruc Coronary artery motion: Axial CT images reconstructed at 90% (A) and 70% (B) of the R-R interval demonstrate the importance of imaging during the phase of least cardiac motion.
  • Respiratory motion artifacts

  • Streak artifacts: Can result from beam hardening secondary to metal clips or can be caused by dense contrast

  • Blooming artifacts: Can cause small, high-contrast structures such as stents and calcium to appear larger than they are [4] (see the image below)

  • Blooming artifact: Multiplanar reconstruction (MPR Blooming artifact: Multiplanar reconstruction (MPR) CT image demonstrates blooming artifact from a left anterior descending (LAD) artery stent. The stent lumen is poorly visualized secondary to this artifact.

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