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In general, dermatologists are unaware of the percentage of radiation transmitted by the lead foil they so commonly use for protection of the skin. In the administration of heavy doses for epitheliomas and plantar warts, this lack of precise knowledge leads to the frequent employment of multiple layers of foil—entirely unnecessary in most instances. The following table gives the percentage of radiation transmitted through various thicknesses of lead foil, at several commonly employed kilovoltages. The measurements were made on the radiation from a shockproof tube, of a type frequently used by dermatologists. In the interest of brevity, a description of the technical procedures will be omitted.
LANDAUER RS, LANDAUER RS. PROTECTIVE VALUES OF LEAD FOIL. Arch Derm Syphilol. 1950;61(5):864. doi:10.1001/archderm.1950.01530120155022
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