ABSTRACT
The application of ultraviolet (UV) light B for the treatment of skin diseases illustrates the application of a natural process based on observation of its beneficial effect, followed by further investigation and refinement of the delivery for practical use. This chapter is concerned with the application of UVB wavelengths and the medical therapeutic effect on skin conditions and diseases. Sources used for whole body UVB phototherapy are mainly fluorescent lamps, although metal halide lamps may also be used for whole body use. The determination of a minimal erythema dose is dependent upon proper dosimetry of the phototherapy device and wavelength used. The need for monitoring of the patient and adjustment of the treatment schedules point toward the invaluable function of the phototherapy technician and the benefits of having the phototherapy center within or in close proximity to the general clinic or a location easily accessible by the clinician.
