,对体表皮肤的影响比较显著。前列腺在身体正中,距离体表皮肤比较远,所以影响小
回答: 放疗是360度旋转射线投影,对局部的皮肤影响取决于聚焦点到体表皮肤的距离。鼻咽癌距离脸部鼻部皮肤近,所以投影射线的单位面积能量高
由 ClearCase
于 2025-05-08 16:36:00
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