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Oral Surg Oral Med Oral Pathol Oral Radiol. 2013 May;115(5):682-91. doi: 10.1016/j.oooo.2013.02.008.

The effect of computed tomographic scanner parameters and 3-dimensional volume rendering techniques on the accuracy of linear, angular, and volumetric measurements of the mandible.

Author information

1
Waisman Center, University of Wisconsin-Madison, Madison WI 53705, USA.

Abstract

OBJECTIVES:

This study investigates the effect of scanning parameters on the accuracy of measurements from three-dimensional (3D), multi-detector computed tomography (MDCT) mandible renderings. A broader range of acceptable parameters can increase the availability of computed tomographic (CT) studies for retrospective analysis.

STUDY DESIGN:

Three human mandibles and a phantom object were scanned using 18 combinations of slice thickness, field of view (FOV), and reconstruction algorithm and 3 different threshold-based segmentations. Measurements of 3D computed tomography (3DCT) models and specimens were compared.

RESULTS:

Linear and angular measurements were accurate, irrespective of scanner parameters or rendering technique. Volume measurements were accurate with a slice thickness of 1.25 mm, but not 2.5 mm. Surface area measurements were consistently inflated.

CONCLUSIONS:

Linear, angular, and volumetric measurements of mandible 3D MDCT models can be confidently obtained from a range of parameters and rendering techniques. Slice thickness is the primary factor affecting volume measurements. These findings should also apply to 3D rendering using cone-beam CT (CBCT).

PMID:
23601224
PMCID:
PMC3633147
DOI:
10.1016/j.oooo.2013.02.008
[Indexed for MEDLINE]
Free PMC Article

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