Polyurethane phantoms with homogeneous and nearly homogeneous optical properties

Ville T. Keränen; Anssi J. Mäkynen; Amanda L. Dayton; Scott A. Prahl

doi:10.1117/12.843609

24 February 2010 Polyurethane phantoms with homogeneous and nearly homogeneous optical properties

Ville T. Keränen, Anssi J. Mäkynen, Amanda L. Dayton, Scott A. Prahl

Proceedings Volume 7567, Design and Performance Validation of Phantoms Used in Conjunction with Optical Measurement of Tissue II; 75670D (2010) https://doi.org/10.1117/12.843609
Event: SPIE BiOS, 2010, San Francisco, California, United States

Abstract

Phantoms with controlled optical properties are often used for calibration and standardization. The phantoms are typically prepared by adding absorbers and scatterers to a clear host material. It is usually assumed that the scatterers and absorbers are uniformly dispersed within the medium. To explore the effects of this assumption, we prepared paired sets of polyurethane phantoms (both with identical masses of absorber, India ink and scatterer, titanium dioxide). Polyurethane phantoms were made by mixing two polyurethane parts (a and b) together and letting them cure in a polypropylene container. The mixture was degassed before curing to ensure a sample without bubbles. The optical properties were controlled by mixing titanium dioxide or India ink into polyurethane part (a or b) before blending the parts together. By changing the mixing sequence, we could change the aggregation of the scattering and absorbing particles. Each set had one sample with homogeneously dispersed scatterers and absorbers, and a second sample with slightly aggregated scatterers or absorbers. We found that the measured transmittance could easily vary by a factor of twenty. The estimated optical properties (using the inverse adding-doubling method) indicate that when aggregation is present, the optical properties are no longer proportional to the concentrations of absorbers or scatterers.

Citation Download Citation

Ville T. Keränen, Anssi J. Mäkynen, Amanda L. Dayton, and Scott A. Prahl "Polyurethane phantoms with homogeneous and nearly homogeneous optical properties", Proc. SPIE 7567, Design and Performance Validation of Phantoms Used in Conjunction with Optical Measurement of Tissue II, 75670D (24 February 2010); https://doi.org/10.1117/12.843609

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available