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Dentomaxillofacial Radiology (2009) 38, 104-111
© 2009 British Institute of Radiology
doi: 10.1259/dmfr/16577933

TECHNICAL REPORT

Volumetric tomography – a new tomographic technique for panoramic units

A Cederlund*,1, M Kalke2 and U Welander1

1Department of Oral Radiology, Eastman Institute, Stockholm, Sweden; 2PaloDEx Group Oy, Tuusula, Finland

*Correspondence to: Department of Oral Radiology, Eastman Institutet, Dalagatan 11, S–113 24 Stockholm, Sweden. E-mail: andreas.cederlund{at}socialstyrelsen.se

Received 11 September 2007; revised 19 March 2008; accepted 27 March 2008

Objectives: To introduce a new three-dimensional dental imaging technique named volumetric tomography (VT).

Methods: The new VT imaging method utilizes an iterative frequency-based reconstruction technique. With iterative algorithms each voxel value is defined multiple times during reconstruction. Computation time is therefore relatively lengthy. However, multicore processors and graphic board programming reduce the reconstruction time, making it possible to utilize this iterative reconstruction technique in clinical practice. The new VT technique is an add-on to a standard panoramic unit (Orthopantomograph OP 200 D; Instrumentarium Oy, Tuusula, Finland). Unit enhancements include a device for patient positioning and additional software. Preliminary clinical examinations have been performed.

Results: Examinations demonstrated that the new VT technique gives satisfactory volumetric patient data from which tomographs may be derived for different clinical applications.

Conclusions: The new VT method may be employed when tomographic examinations are required for dental clinical work.

Keywords: radiography, dental, digital; radiography, panoramic; tomography






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