S-face-mask
As one of the most commonly-used materials in the radiotherapy of head tumors, S-face-mask is fixed on a motherboard by means of expansion. It models conveniently and fixes firmly, and the modeling shapeis attractive. so more and more physicians prefer to use it. As the mask is greatly stretched in the process of molding, the material tends to become thinner, and the fixing effect will be affected to some extent. Materials with a small aperture and a small percentage of mesh are commonly selected.
