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Related Experiment Video

Updated: Apr 15, 2026

Author Spotlight: A Stable Phantom Material for Optical and Acoustic Imaging

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Published on: June 16, 2023

Determination of Finger Optical Properties Using an Integrating Sphere.

Markus Wagner^1,2, Benedikt Beutel^1,2, Peter Naglic²

¹Faculty of Natural Sciences, Ulm University, D-89081 Ulm, Germany.

Sensors (Basel, Switzerland)

|April 14, 2026

Summary

This summary is machine-generated.

This study adapts integrating sphere measurements for human fingers, enabling accurate optical property determination. The method quantifies key tissue components like fat, water, and hemoglobin in fingers.

Keywords:

cylinder finger phantom integrating sphere optical properties oxygenation silicone tissue components

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Area of Science:

Biomedical Optics
Medical Imaging
Optical Physics

Background:

Integrating sphere measurements are standard for planar optical properties.
Previous methods were limited to slab geometries.
Optical properties of complex 3D biological tissues like fingers are challenging to measure.

Purpose of the Study:

To adapt integrating sphere measurements for cylindrical geometry.
To determine the optical properties of human fingers.
To validate the method using phantoms and apply it to in vivo measurements.

Main Methods:

Adapted integrating sphere theory for cylindrical samples.
Validated the adapted method using cylindrical and 3D finger phantoms.
Applied the method to measure optical properties of human fingers.

Main Results:

Demonstrated high agreement between cylindrical and slab phantom optical properties (absorption coefficient μa, reduced scattering coefficient μs').
Successfully applied the method to human fingers.
Enabled quantification of fat, water, collagen, total hemoglobin, and oxygenation in finger tissues.

Conclusions:

Integrating sphere measurements can be effectively extended to cylindrical geometries for biological tissues.
This technique provides a non-invasive method for assessing human finger optical properties and tissue composition.
The developed approach has potential for clinical diagnostics and research in tissue optics.