Artifactual thickening of the sinus walls on computed tomography: A phantom model and clinical study

Jean Yves Sichel, Fatma Gul-Aksoy, Eric Dangoor, Itzhak Dano, Ron Eliashar, Moshe Gomori

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Measuring sinus wall thickness on computed tomography may be important for distinguishing between acute and chronic inflammation of the paranasal sinuses or in cases of a suspected neoplasm. The objective of this study was to investigate the effects of opacified and aerated sinuses on the appearance of sinus wall thickness. A phantom model consisting of a skull half-immersed in water was scanned, and various slice thicknesses and different windows were used. The sinus walls of the water-immersed side appeared to be thicker than those of the aerated side. Bone windows did not completely eliminate this partial volume effect. It was concluded that comparison between a fluid- or tissue-filled sinus and an air-filled counterpart is not accurate enough for evaluating sinus wall thickness. Bone windows do not completely eliminate the artifactual thickening of the bony wall of a filled sinus.

Original languageAmerican English
Pages (from-to)859-862
Number of pages4
JournalAnnals of Otology, Rhinology and Laryngology
Volume109
Issue number9
DOIs
StatePublished - 2000
Externally publishedYes

Keywords

  • Computed tomography
  • Paranasal sinuses
  • Partial volume effect
  • Sinus wall thickness

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