Accuracy of three-dimensional camera system based on stereophotography on photographic acquisition of deformity facial images.

Peng-Cheng GAO; Zhen-Qi ZHAO; Ya-Li CHEN; Yang ZHAO; Li-Zhe XIE; Bin YAN; Lin WANG

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Accuracy of three-dimensional camera system based on stereophotography on photographic acquisition of deformity facial images.

Author: Peng-Cheng GAO ¹ ; Zhen-Qi ZHAO ² ; Ya-Li CHEN ³ ; Yang ZHAO ⁴ ; Li-Zhe XIE ⁵ ; Bin YAN ⁵ ; Lin WANG ⁵
Author Information

1. Dept. of Stomatology, Zhongda Hospital Southeast University, Nanjing 210029, China.
2. Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing 210029, China;Dept. of Orthodontics, Affiliated of Stomatology, Nanjing Medical University, Nanjing 210029, China.
3. Dept. of Stomatology, Huai'an Hospital of Traditional Chinese Medicine, Huai'an 223001, China.
4. School of Public Health, Nanjing Medical University, Nanjing 211166, China.
5. Jiangsun Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing 210029, China;Dept. of Orthodontics, Affiliated of Stomatology, Nanjing Medical University, Nanjing 210029, China.
Publication Type:Journal Article
Keywords: accuracy; facial deformity; three-dimensional photography
MeSH: Craniofacial Abnormalities; diagnostic imaging; Humans; Imaging, Three-Dimensional; Reproducibility of Results; Software
From: West China Journal of Stomatology 2019;37(2):174-179
CountryChina
Language:Chinese
Abstract: OBJECTIVE:To evaluate and analyze the accuracy of three-dimensional camera system acquisition based on stereophotography for the photographic acquisition of images of facial deformities.
METHODS:3D digital models of 45 waxen facial models of patients with facial deformities were obtained via a 3D camera system based on stereophotography. A total of 19 feature lines were measured on each 3D model by using the software. The measurements taken by the coordinate-measuring machine were accepted as standard values. Statistical analysis was performed to evaluate the accuracy of the system and the corresponding factors.
RESULTS:Statistical analysis results showed that the measured values of the characteristic distance obtained by 3D camera system were statistically different from the standard values (P<0.001). Convex deformities had significant influence on the measuring error of 3D camera system (P<0.05), while cleft deformities had no significant influence on the measuring error (P>0.05). The facial regions significantly influenced measuring error (P<0.05). The deformities had no significant influence on the percentage of measurement values (P>0.05). The middle facial regions had significant difference with bilateral facial regions on the percentage of measurement values (P<0.05), while the left and right facial regions had no significant difference (P>0.05).
CONCLUSIONS:The accuracy of 3D camera system based on stereophotography for the photographic acquisition of facial deformities are influenced by the morphology of the facial deformities and facial regions. Moreover, the measuring error is acceptable in clinical settings.