Abstract
Narrow-band ultraviolet B (NB-UVB) therapy is widely used for refractory skin diseases. Targeted phototherapy is now being used to reduce the number of sessions and to avoid exposing normal skin. We developed a targeted NB-UVB therapy using a flat-type lamp emitting a wavelength similar to that of the TL-01 fluorescent lamp. Six Japanese patients with psoriasis were recruited and treated with the flat-type NB-UVB device with an initial dose of 70% of the minimal erythema dose, with a 20% increase at each subsequent session. The plaque severity score was determined. All lesions of the tested patients were responsive to NB-UVB therapy using the flat-type lamp. The mean percent reduction of the lesion was 58.3 ± 17.7%. The mean cumulative dose was 20.8 ± 10.8 J/cm². No side effects were observed during treatment. The flat-type targeted NB-UVB device is compact and convenient, and highly effective for the treatment of limited psoriasis lesions.
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