Optical imaging technology for body size and shape analysis: evaluation of a system designed for personal use

Abstract

Background/Objectives-Three-dimensional optical (3DO) imaging systems that rapidly and accurately provide body shape and composition information are increasingly available in research and clinical settings. Recently, relatively low cost and space efficient 3DO systems with the ability to report and track individual assessments were introduced to the consumer market for home use. This study critically evaluated the first 3DO imaging device intended for personal operation, the Naked Body Scanner (NBS), against reference methods. Participants/Methods-Circumferences at six standardized anatomic sites were measured with a flexible tape in 90 participants ranging in age (5-74 years), ethnicity, and adiposity. Regression analysis and Bland-Altman plots compared these direct measurements and dual-energy X-ray absorptiometry (DXA) %fat estimates to corresponding NBS values. Method precision was analyzed from duplicate anthropometric and NBS measurements in a subgroup of 51 participants. Results-The NBS exhibited greater variation in test-retest reliability (CV, 0.4%−2.7%) between the six measured anatomic locations when compared to manually measured counterparts (0.2% −0.4%). All six device-derived circumferences correlated with flexible tape references (R 2 s, 0.84-0.97; p < 0.0001). Measurement bias was apparent for three anatomic sites while mean differences were present for five. The NBS's %fat estimates also correlated with DXA results (R 2 =0.73, p < 0.0001) with no significant bias. Users may view, print, copy, and download text and data-mine the content in such documents, for the purposes of academic research, subject always to the full Conditions of use:

Digital anthropometry for body circumference measurements: Toward the development of universal three‐dimensional optical system analysis software

“…16,17 The coefficient of variation for the CA circumference measurements at our center range from 0.3%-0.9% for repeated measurements. 10,11,13 Previously published studies implementing these devices show precision estimates ranging from 0.3% to 5.0% for repeated measurements of the same 11 circumferences. 10,11,13…”

“…10,11,13 Previously published studies implementing these devices show precision estimates ranging from 0.3% to 5.0% for repeated measurements of the same 11 circumferences. 10,11,13…”

“…The coefficient of variation for these circumferences at our center ranges from 0.3%-0.9% for repeated measurements. 10,11,13…”

“…3D scanners ranging from research-grade laser systems to small inhome devices [10][11][12][13] are increasingly popular and widely used. These scanners automatically give consumers and investigators hundreds of digital anthropometric (DA) measurements with little test-retest variation.…”

“…These scanners automatically give consumers and investigators hundreds of digital anthropometric (DA) measurements with little test-retest variation. [10][11][12][13][14] However, through their proprietary software, each manufacturer provides DA measurements unique to their own system and the anatomic site definitions of these measurements are often unclear. Thus, pooling DA data acquired from different systems is largely precluded by variable anthropometric betweenscanner estimates for the same anatomic region.…”