What causes streak artifacts on 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

Streak artifacts from beam hardening can be seen secondary to metal clips. Streak artifact in the superior vena cava and right atrium from dense contrast can limit evaluation of the right coronary artery. This can be mitigated by the use of a saline bolus chaser. However, a saline bolus chaser can result in poor contrast opacification of the right heart lumen, which may limit morphologic and functional evaluation. Protocols that utilize an admixture of saline and contrast are helpful in maintaining right heart opacification without streak artifact.


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