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Ultrasound tissue-mimicking material using oil gel for a phantom is proposed. As the material has advantages in that bacteria do not propagate in it and organic liquids contained in it tend not to evaporate, its characteristics are stable with time. The oil gel is manufactured from ethylene glycol and propylene glycol or polypropylene glycol. The sound velocities and the densities of the organic materials for making the oil gel are measured for evaluation of phantom materials.
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