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Dentomaxillofacial Radiology, Vol 28, Issue 5 316-319, Copyright © 1999 by British Institute of Radiology

ARTICLES

Triple images on panoramic radiographs

I. Reuter, W. Ritter and G. Kaeppler
Institut fur Zahnarztliche Rontgenologie, Zentrum fur Zahn- Mund- und Kieferheilkunde, Westf. Wilhelms-Universitat, Munster, Germany.

OBJECTIVE: To explain the formation of triple images on panoramic radiographs. METHODS: A metal test object was placed in defined positions in relation to movement path of a panoramic X-ray beam. RESULTS: The test object was portrayed once, twice or three times with varying degrees of distortion depending on its location. Triple images were formed when the test object was located in a specific diamond-shaped area distal to the path of the rotation centre of the X-ray beam. CONCLUSIONS: The formation of triple images on panoramic radiographs can be explained on the basis of known projection geometry.


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