Artifacts

Artifacts(아티팩트, 인공물)

종류

USG

• Posterior shadowing
• Reveration artifact
• Anisotrophy artifact
• Mirror image artifact
• Ring down artifact
• Twinkling artifact: doppler study 상 stone과 같은 reflective object의 깊은 쪽으로 turbulent flow 처럼 보임, stone 감별에 sensitive 함.
• Aliasing artifact
• Flash artifact

CT

• Partial volume artifact(Partial volume averaging artifact)
• Motion artifact
• Beam hardening artifact
  • Streaky artifact
    • Perivenous streaky artifact: Saline Flush, 오른팔 이용, 저농도 조영제를 이용하여 해결

MRI

• Chemical shift artifact