Change search
ReferencesLink to record
Permanent link

Direct link
Validity of computed tomography in imaging thin walls of the temporal bone
Umeå University, Faculty of Medicine, Department of Odontology.
Umeå University, Faculty of Medicine, Department of Odontology.
1999 (English)In: Dento-Maxillo-Facial Radiology, ISSN 0250-832X, Vol. 28, no 1, 13-19 p.Article in journal (Refereed) Published
Abstract [en]

OBJECTIVES: To evaluate the validity of computed tomography (CT) for reproduction of the bone margins of the temporomandibular joint (TMJ).

METHODS: Seven TMJ specimens were examined with a CT and then cryosectioned. The bone separating the TMJ from the middle cranial fossa, middle ear and external auditory canal was measured as the full width at half maximum (FWHM). Measurements were compared with the true thickness of the bone wall.

RESULTS: There was good agreement when the bone walls were thicker than 1 mm: accuracy was influenced only by the angle of the bone wall to the scanning plane. Conversely, bone walls thinner than 1 mm were reproduced with a magnification that increased with decreasing bone thickness. The difference increased further as the inclination of the bone wall became greater.

CONCLUSION: Measurements performed at FWHM are reliable within +/- 10% for bone walls more than approximately 1 mm thick which form an angle of less than 35 degrees to the perpendicular of the scanning plane. For bone walls thinner than 1 mm and for those thicker than 1 mm with an inclination exceeding approximately 35 degrees, partial volume effects result in a progressively increasing magnification of bone thickness.

Place, publisher, year, edition, pages
1999. Vol. 28, no 1, 13-19 p.
Keyword [en]
tomography, X-ray computed, temporal bone, temporomandibular joint, ear canal
National Category
Other Medical Sciences
URN: urn:nbn:se:umu:diva-90745DOI: 10.1038/sj.dmfr.4600398ISI: 000077950800003PubMedID: 10202473OAI: diva2:730998
Available from: 2014-06-30 Created: 2014-06-30 Last updated: 2014-08-05Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textPubMed

Search in DiVA

By author/editor
Ahlqvist, JanIsberg, Annika
By organisation
Department of Odontology
In the same journal
Dento-Maxillo-Facial Radiology
Other Medical Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 48 hits
ReferencesLink to record
Permanent link

Direct link