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Report No.
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Development of lung and soft tissue substitutes for photons

Kinase, Sakae   ; Kimura, Masaya*; Noguchi, Hiroshi; Yokoyama, Sumi

We have developed polyurethane-based tissue substitutes simulating lung, soft tissue, muscle, muscle-adipose mixture tissue, cartilage, brain, larynx, trachea, thyroid, kidney, liver and skin. The formulation of the tissue substitutes for photons was based on the basic data method together with an equation for calculating the optimum relative mass of corrective additives. The tissue substitutes were formulated to be phantom materials in the photon energy range of at least 10 keV-10 MeV. In particular, they were designed to match the tissues with linear attenuation coefficients for low photon energy (13.6, 17.2 and 20.2 keV from $$^{239}$$Pu) and to have the same mass densities as the tissues. The tissue substitutes developed in the present study were examined for the photon transmissions using 16.6 keV KX-rays from $$^{93}$$Nb$$^{m}$$. The experimental transmission curves of the substitutes were found to be in good agreement with those derived from data on the tissues in ICRP Publication 23. It was found that the tissue substitutes are suitable as the corresponding tissues defined in ICRP.

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