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Comparative Study
. 2013 Sep 10:14:24.
doi: 10.1186/2196-1042-14-24.

Low-dose protocol of the spiral CT in orthodontics: comparative evaluation of entrance skin dose with traditional X-ray techniques

Giancarlo Cordasco  1 , Marco Portelli, Angela Militi, Riccardo Nucera, Antonino Lo Giudice, Elda Gatto, Alessandra Lucchese
Affiliations
Comparative Study

Low-dose protocol of the spiral CT in orthodontics: comparative evaluation of entrance skin dose with traditional X-ray techniques

Giancarlo Cordasco et al. Prog Orthod. .

Abstract

Background: The aim of this study was to evaluate the amount of radiation doses absorbed by soft tissues (entrance skin dose) with a low-dose spiral computed tomography (CT) protocol compared to conventional X-ray techniques commonly used in orthodontics.

Methods: The amount of skin dose has been evaluated using a tissue-equivalent head-neck radiotherapy humanoid phantom with thermoluminescent dosimeters placed at the level of eye lens, parotid glands, and thyroid glands. CT images have been taken using a Sensation 16 Siemens CT scan and a low-dose protocol (15 mAs, 1 pitch, 2.5 mGy (CTDIvol), 80 kV, 1-mm slice thickness).

Results: The difference in image quality between traditional X-ray techniques and low-dose spiral CT was statistically significant (P<0.05). The difference in mean absorbed dose instead was not statistically significant.

Conclusions: Our protocol allows a more accurate orthodontic diagnosis without an increase of radiological risk for the patients in comparison to traditional X-ray techniques.

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Figures

Figure 1
Figure 1
CT scan (Somaton Sensation 16 Siemens®).
Figure 2
Figure 2
CT images.
See this image and copyright information in PMC

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