3DBODY.TECH 2021 - Abstract 21.39

J. P. Bennett et al., "Accessible Five Compartment Body Composition via 3-Dimensional Imaging and Bioelectrical Impedance", Proc. of 3DBODY.TECH 2021 - 12th Int. Conf. and Exh. on 3D Body Scanning and Processing Technologies, Lugano, Switzerland, 19-20 Oct. 2021, #39.


Accessible Five Compartment Body Composition via 3-Dimensional Imaging and Bioelectrical Impedance


Jonathan P. BENNETT, Devon CATALDI, Brandon K. QUON, Yong En LIU, Nisa N. KELLY, Tom KELLY, Steven B. HEYMSFIELD, Andrea K. GARBER, Ethan J. WEISS, John A. SHEPHERD

University of Hawaii Cancer Center, Honolulu HI, USA


Five-compartment modeling of body composition (bone mineral, fat, water, protein, extraosseous mineral masses) is considered to be the criterion in vivo model for body composition assessment. Use of multiple techniques to assess composition minimizes measurement errors of each separate contributor and allows for a more accurate estimation of body composition in populations where hydration, bone density, or musculature may vary significantly. However, the 5-compartment (5C) model requires multiple technologies including dual-energy X-ray absorptiometry (DXA) for bone mass, air-displacement plethysmography (ADP) for body volume, deuterium dilution (D2O) for total body water measurement and extraosseous mineral estimation and scale weight. The combination is time-consuming, taking 4 hours for the acquisition alone, and costly, limiting its broad use. The purpose of this study was to compare the standard 5C model to an accessible version using 3-dimensional optical (3DO) imaging, bioelectrical impedance analysis (BIA) and scale weight, a model named 3DO-5C.

Student athletes enrolled in the Da Kine Study at the University of Hawaii, Manoa participated. The target was to recruitment of 80 athletes (40 female) from a variety of collegiate sports. Each measure for the 5-compartment model was performed including scale weight for body mass (BM), D2O for total body water (TBW) and soft tissue mineral (Ms) estimation, DXA for bone mineral mass (Mo), and ADP for body volume (BV). Wang's form of the 5-compartment model was used to estimate body fat mass (FM) as FM = 2.748 * BV − 0.715 * TBW + 1.129 * Mo + 1.222 * Ms − 2.051 * BM. BIA was calibrated to TBW and 3-dimensional optical was calibrated to BV. Demographics were modeled to estimate Mo using data from the Shape Up! Adults study dataset. The simplified multicompartment model (3DO-5C) was modeled and validated using a 5-fold cross validation.

Analysis included 72 participants (34 female; mean age 23.3 +- 4.9 years) with all measures available. 3DO estimates of body volume was highly accurate to ADP (R2=0.99, ADP = 0.998 * 3DO + 1.676). BIA estimated TBW was also highly associated to deuterium dilution (R2=0.98, D2O = 0.986 * BIA - 0.646). DXA Mo was estimated using height, weight, and gender (R2=0.71). An additional correction term was used in the Wang equation to account for covariance of the technique, 3DO-5C = Wang-5C = Wang-3DO + Cov, where Cov = gender, BIA TBW, 3DO volume. With the above substitutions, 3DO-5C model was highly associated with the criterion model (r2 = 0.92, RMSE = 2.0 kg).

3DO-5C provides an accessible, cost-effective and accurate measure of 5-compartment body composition. The use of this practical and easy to use model to measure body composition and hydration has the potential for clinical monitoring of acute changes in sport and clinical practice.


Multicompartment body composition, optical body scanning


Abstract: 2139bennett-eabs.pdf
Proceedings: 3DBODY.TECH 2021, 19-20 Oct. 2021, Lugano, Switzerland
Paper id#: 39
Presentation video: 3DBodyTech2021_39_Bennett.mp4

Copyright notice

© Hometrica Consulting - Dr. Nicola D'Apuzzo, Switzerland, hometrica.ch.
Reproduction of the proceedings or any parts thereof (excluding short quotations for the use in the preparation of reviews and technical and scientific papers) may be made only after obtaining the specific approval of the publisher. The papers appearing in the proceedings reflect the author's opinions. Their inclusion in these publications does not necessary constitute endorsement by the editor or by the publisher. Authors retain all rights to individual papers.

Note: click the + on the top left of the page to open/close the menu.