Layer thickness in rotational panoramic radiography: some specific aspects

U. Welander, G. Tronje, W. D. McDavid

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


It is customary to define the thickness of the image layer in rotational panoramic radiography along the central ray of the X-ray beam. This results in calculated values which overestimate its thickness, especially in regions where the central ray deviates markedly from orthogonality. A supplementary definition is proposed which considers layer thickness in a direction perpendicular to the central plane of the image layer. This provides values which may be more easily related to the thickness of the object being radiographed. A mathematical approximation for calculations involving the supplementary definition is described and illustrated with numerical examples.

Original languageEnglish (US)
Pages (from-to)119-124
Number of pages6
JournalDentomaxillofacial Radiology
Issue number3
StatePublished - Aug 1989


  • Radiography
  • panoramic

ASJC Scopus subject areas

  • Otorhinolaryngology
  • Radiology Nuclear Medicine and imaging
  • Dentistry(all)


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