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Monday, April 25, 2011

MRI take home point (11) Done

  • Most artifacts in PE direction (such as motion) but chemical shift artifact which in FE direction.
  • Ringing artifacts by insufficient sample points, Wraparound artifacts by insufficient FOV.
  • Gd-chelates’ primary effect is marked shortening of T1; thus heavily T1-weighted sequences are essential for high sensitivity to cancer.
  • Gd-chelate contrast agents have the potential to cause a new, potentially serious disease (nephrogenic systemic fibrosis or NSF) in patients who have moderate to end-stage kidney disease at the time of administration of contrast agent

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