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» Image Artefacts

These questions are concerned with MRI image features which do not represent the object in the field-of-view.

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Zipper Artefacts

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What are the sources of zipper artefact?

  • Stimulated echo (generated in multiecho pulse sequences, frequency encoding direction, central)
  • RF feedthrough (receive coil receives some of the RF excitation pulse, phase encoding direction, zero frequency)
  • External RF noise

Further reading on this topic:
Books: MRI From Picture to Proton p101, MRI The Basics p186-196, Q&A in MRI p145
Online: MRItutor, Chickscope

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