Methods The color and transparency of different concentration phantoms were observed. Properties including density, acoustic speed and acoustic attenuation of PAA gel phantom were measured.
方法观察模块浓度的不同所致颜色与透明度的变化，并对PAA模块的声学特性包括密度、声速及声衰减进行测量。
Objective To evaluate the therapeutic efficacy of the domestic polyacrylic acid (PAA) gel for the treatment of dry eyes.
目的评价国产聚丙烯酸(PAA)凝胶治疗干眼症的临床疗效。
Objective To evaluate the therapeutic efficacy of the domestic polyacrylic acid (PAA) gel for the treatment of dry eyes.
目的评价国产聚丙烯酸(PAA)凝胶治疗干眼症的临床疗效。
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