3D Scanning At The Fingertips Of Patients And Surgeons: Accuracy And Precision Testing Of The Iphone X 3D Scanner
Hayeem Rudy, BA, Nicole Wake, PhD, Alex Gordon, BA, Judy Yee, MD, Evan Garfein, MD, Oren Tepper, MD.
Montefiore Health System/Albert Einstein College of Medicine, Bronx, NY, USA.
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.
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.
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.
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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