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The excellent electrically transparent property and homogeneous pore distribution of PMI foam meets the homogeneous imaging demand of medical bed. Vicell PT series with composite carbon fiber structure have high intensity and low x-ray absorption rate, and the advantages of high imaging definition, stiffness and intensity integrated by its electrically transparent property are obviously better than traditional bed. Besides, it has extraordinary fire-resistance property, heat-resistance property and radiation-resistance property which are the keys of improving the overall performance of equipment.