(P31-039-23) Accuracy of a Low-Cost 2D Optical Imaging System for Automated Anthropometry in Research and Clinical Settings

Objectives: 3D optical imaging systems are increasingly being used in healthcare settings for quantifying a person’s size, shape, body composition, and health risks. Professional-grade 3D systems are costly, although new 2D devices offer a more affordable option. These newly introduced 2D devices are available mainly as smartphones coupled with software applications, although this technology is not suitable for clinical use in professional healthcare settings. The aim of the current study was to evaluate the accuracy of a new relatively low-cost 2D system (MS-1; Size Stream, Cary, NC) incorporated into a stationary iPad mounted inside a private mobile booth environment.

Methods: Ground truth circumference measurements of the waist, hip, upper arms, and mid-thighs made by a trained anthropometrist in 62 healthy adults were compared to those acquired with a 3D reference scanner (SS20; Size Stream) and the 2D MS-1. The same software was used to generate circumference estimates from object files acquired from both devices that were then compared to the reference flexible tape measurements at the same anatomic sites.

Results: The MS-1 and SS20 had similar coefficients of variation that were minimally larger than those by the tape (e.g., waist, 1.80, 1.01, and 0.05%). The strength of correlations between the MS-1 and SS20 with reference tape circumferences were all strong (p < 0.001) with minimally higher R2’s for the 3D scanner (0.59-0.91 vs. 0.74-0.94, respectively); minimal significant (p < 0.05- < 0.001) bias was present between both imaging approaches and some tape measurements.

Conclusions: These proof-of-concept observations open the possibility of phenotyping adult size, shape, body composition, and health risks in research and clinical settings with a relatively low cost 2D optical imaging system.

Funding Sources: This study was funded by the Shape Up! Adults Study.