CT stair-step artifact

The CT stair-step artifact is found in straight structures which are oriented obliquely with respect to movement of the table and appear around the edges of sagittal and coronal reformatted images when wide collimations and non-overlapping reconstruction intervals are used.

Solution

This can be minimized by, using smaller collimation and overlapping reconstruction in helical imaging.

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Article Information

rID: 27658
Section: Physics
Synonyms or Alternate Spellings:
  • CT stair-step artefact

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Cases and Figures

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    Case 1 - on CTA
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