Application of controlled high dose rates in UV-B phototherapy for psoriasis

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Abstract
The use of a cabin fitted with Sylvania UV-21 tubes, which have a very high output of UV-B radiation, made it possible to treat psoriasis patients with a maximal exposure time of 5 min per session. An exposure-control unit was used to measure and regulate the applied dose to prevent overdosage. The clinical results obtained with 2 comparable groups of psoriasis patients treated with Sylvania UV-6 or UV-21 tubes were equal.