| 摘要 |
The invention relates to a device for protecting a skin area against light when detecting and/or treating skin disorders, especially cancer and its preliminary stages, including application of compounds and/or compositions to the skin, in connection with which a photoreactive substance appears in the skin area. The device comprises an opaque foil (1) forming a cavity (4) relative to the skin and having edges (3) engaging the skin, the width of the edges (3) being determined by formula (I), wherein m=the width of the edge, delta=the penetration depth of the light in the skin, In=the natural logarithm, t=the time of the effect of the light, I0=the luminous intensity at the skin surface, and Ddiffused=the diffused energy dose which is allowed to reach the skin area concerned. |
