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Updated: Sep 20, 2025

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Diffuse optical spectroscopic method for tissue and body composition assessment.

Robert V Warren1, Ronen Bar-Yoseph2,3, Brian Hill1,4

  • 1University of California, Beckman Laser Institute and Medical Clinic, Irvine, California, United States.

Journal of Biomedical Optics
|June 9, 2022
PubMed
Summary
This summary is machine-generated.

Diffuse optical spectroscopic imaging (DOSI) offers a novel, non-invasive method for assessing body composition and tissue oxygenation. This technology can predict adiposity and whole-body fat percentage, advancing metabolic health monitoring.

Keywords:
bed-side monitoringbody compositiondiffuse optical spectroscopic imagingdual energy x-ray absorptiometrynear-infrared spectroscopy

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Area of Science:

  • Biomedical Optics
  • Medical Imaging
  • Body Composition Analysis

Background:

  • Rising obesity and metabolic syndrome necessitate advanced body composition assessment methods.
  • Current techniques like DXA are often expensive, non-portable, involve radiation, and lack metabolic insights.
  • There is a need for non-invasive, portable methods that assess both adiposity and tissue oxygenation.

Purpose of the Study:

  • To evaluate diffuse optical spectroscopic imaging (DOSI) for predicting site-specific adiposity and whole-body fat percentage.
  • To assess DOSI's capability in simultaneously measuring local tissue hemoglobin and oxygenation.
  • To develop a new optical method for estimating adipose tissue thickness.

Main Methods:

  • Diffuse optical spectroscopic imaging (DOSI) measurements were taken from gastrocnemius, quadriceps, abdomen, and biceps in 99 participants (aged 7-34).
  • Dual-energy x-ray absorptiometry (DXA) was used for whole-body composition analysis.
  • Ultrasound measured skin and adipose tissue thickness (SATT) in the quadriceps.

Main Results:

  • DOSI-derived parameters correlated with ultrasound-measured SATT.
  • A novel parameter, optical fat fraction (OFF), was defined to estimate SATT using broadband absorption and scattering spectra.
  • A prediction model using DOSI-derived OFF accurately predicted DXA body-fat percentage.

Conclusions:

  • Diffuse optical spectroscopic imaging (DOSI) can effectively assess adiposity at specific tissue sites and for the entire body.
  • The newly defined optical fat fraction (OFF) parameter shows promise for quantifying body composition.
  • DOSI presents a viable, non-invasive tool for advanced body composition analysis and metabolic health monitoring.