In December 1895 the German physicist Wilhelm Conrad Röntgen demonstrated the first X-ray pictures, among them that of the left hand of Mrs. Röntgen. Within a few weeks the news of the discovery spread throughout the world, and the penetrating properties of the rays were soon exploited for medical diagnosis without immediate realization of possible deleterious effects.
The first reports of X-ray injury to various human tissues and to vision came in 1896. In that same year Elihu Thomson, the physicist, deliberately exposed one of his fingers to Xray and provided accurate scientific observations on the development of Röntgen-ray burns.
(Encyclopaedia Britannica)
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