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3D Facial Scanning At The Fingertips Of Patients And Surgeons: Accuracy And Precision Testing Of Iphone X 3D Scanner
Hayeem L. Rudy, BA, Nicole Wake, PhD, Alex Gordon, BA, Judy Yee, MD, Evan Garfein, MD, Oren Tepper, MD.
Montefiore Medical Center, Bronx, NY, USA.

PURPOSE: The iPhone X is the first smartphone to be released with a high-fidelity 3D scanner. At present, half of all US smartphone users use an iPhone and data suggest that over 230 million individuals will upgrade to the iPhone X within two years. Given this profound expansion in access to 3D scanning technology, the purpose of this study was to compare the iPhone X scanner against a popular, portable 3D camera used in plastic surgery.
METHODS:
Sixteen live subjects (n=16) underwent 3D facial capture with the iPhone X and Canfield Vectra H1. Results were compared using color map analysis and surface distances between key anatomical landmarks. To control for micro-expression, three 3D-printed facial masks were captured with each device and compared (n=3). In addition, to assess reproducibility of the iPhone X, six (n=6) scans of a single participant were obtained and compared using color map analysis.
RESULTS: The average difference between the iPhone and 3D camera was 0.44mm following color map analysis, and 0.46mm following surface distance comparison. For the 3D-printed facial mask comparison, average difference was 0.28mm. For reproducibility and precision testing, the difference between scans following color map analysis was 0.35mm.
CONCLUSION: The iPhone X offers 3D scanning that is accurate and precise to within half a millimeter of a professional 3D camera. The iPhone offers advantages with regard to cost, accessibility, and portability when compared to traditional 3D cameras, and may be a new platform for sharing 3D data between patients and surgeons.


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