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phototherapy
irradiation of the skin or other tissues, typically with ultraviolet radiation, in the treatment of diseases (e.g. psoriasis)
Note 1 to entry: The term "photodynamic therapy" has been used where special photo-sensitizing agents have been added as part of the treatment, or are endogenous in the tissue being targeted.
Note 2 to entry: This entry was numbered 845-06-12 in IEC 60050-845:1987.
Note 3 to entry: This entry was numbered 17-945 in CIE S 017:2011.