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Radiation Protection Dosimetry Advance Access originally published online on January 6, 2006
Radiation Protection Dosimetry 2006 121(2):202-207; doi:10.1093/rpd/nci371
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© The Author 2005. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

TECHNICAL NOTE

The radiological properties of a novel lung tissue substitute

R. J. Traub1,*, P. C. Olsen1,2 and J. C. McDonald1

1 Pacific Northwest National Laboratory, Richland, WA 99354, USA
2 Present Address: Bechtel Hanford, Inc., Richland, WA 99354, USA

* Corresponding author: Richard.Traub{at}pnl.gov

Received August 22, 2005, amended November 1, 2005, accepted November 16, 2005


  Abstract

Lung phantoms have been manufactured using commercially available, polyurethane foam products. Some of these materials are no longer available; therefore, a new lung tissue substitute was developed. The elemental composition and radiological properties of the new lung tissue substitute are described in this paper. Because the lung tissue substitute will be used to manufacture phantom lungs that will be used to evaluate chest counting systems, it is necessary to know the radiological properties of the material. These properties must be compared with reference materials and materials that have been used for lung phantoms in the past. The radiological properties of interest include the electron density, mean excitation energy, electron stopping power and photon mass attenuation coefficients. In all these properties, the calculated values for the new lung tissue substitute closely matched the calculated values of ICRU Publication 44 lung tissue. Good agreement was also found when the new lung tissue substitute was compared with the Griffith lung tissue substitute described by the ICRU. The new material was determined to be an excellent lung tissue substitute.


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