“…This is particulary true in the field of skin radiation biology in which soft X-rays, because of their rapid attenuation, can easily be used without damaging vital deeper organs or tissues . Only few authors have studied their effects on the mammalian skin (Toosy 1951, Maggiora and Brun 1962, Carlsen and Asboe-Hansen 1971 . Using superficiallypenetrating X-radiation could also help to elucidate the possible role of the dermis in producing the epidermal lesion.…”