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Dentomaxillofacial Radiology, Vol 26, Issue 5 304-311, Copyright © 1997 by British Institute of Radiology

ARTICLES

Simultaneous multilayer arthrotomography of the temporomandibular joint using photostimulable phosphor computed radiography

E. Honda, N. Ohbayashi, T. Sasaki and K. Kino
Department of Dental Radiology and Radiation Research, Faculty of Dentistry, Tokyo Medical and Dental University, Japan.

OBJECTIVE: To compare the image quality of photostimulable phosphor computed radiography (CR) with that of a conventional screen-film system for simultaneous multilayer arthrotomography of the temporomandibular joint (TMJ). METHODS: X-ray attenuation, resolution and granularity was compared. Simultaneous multilayer tomography of TMJ was performed using a skull phantom and diagnostic quality of bone structures estimated. The clinical outcome is demonstrated in two typical cases. RESULTS: X-ray attenuation was larger with CR. Granularity was more prominent in edge-enhanced CR images and was associated with inferior diagnostic quality. However, it was improved by using a higher tube voltage. Clinical CR without edge enhancement showed a similar resolution to the conventional system but this decreased with enhancement. In an enhanced arthrotomogram, the boundary between contrast medium, bone and soft tissue were clearly defined and a fibrous adhesion also easily seen. CONCLUSION: Photostimulable phosphor CR is an acceptable alternative for simultaneous multilayer arthrotomography of the TMJ.




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Copyright © 1997 by the British Institute of Radiology.