Tissue-mimicking Materials for various kind of Phantoms

We present a tissue-mimicking material for the phantom of medical diagnostic instruments. Accurate testing of an instrument by phantoms requires a tissue-mimicking material that has the acoustic velocity, density, and attenuation defined in the International Electrotechnical Commission (IEC) standard, and furthermore the tissue-mimicking material must be stable over time. To achieve the material with the desired acoustic velocity, density, and attenuation, we have developed a new swollen segmented polyurethane gel. To realize the gel with low attenuation, we have discussed liquid composition of the gel. Acoustic properties of binary mixtures of tetraethylene glycol dimethyl ether with 1-ethyl-3-methylimizazolium dicyanamid, 1-butthyl-3-methylimizazolium dicyanamide, and 1-ethyl-3-methylimizazolium thiocyanate have been experimentally investigated.