Mountford P J
Photodermatol. 1986 Apr;3(2):83-91.
An appreciation of the salient physical properties of phototherapy and photochemotherapy treatment equipment should benefit any center constructing its own unit, or may influence the choice of a commercial system. These properties are discussed and different commercial units are listed. Fluorescent lamp arrays are the most commonly used source of ultraviolet radiation. The spectra of fluorescent lamps for PUVA are very similar, but there are clinically important variations between the emission spectra of different types of UVB lamp. The spatial uniformity and magnitude of irradiance will be affected by the number and distribution of tubes in a unit, and by the use of aluminium reflectors. It is usual to find such reflectors located behind an array of lamps, but horizontal reflectors positioned above and below enclosed vertical cabinets are often omitted. The measured irradiance in a unit depends on many factors, and specified irradiances must be compared with caution. Treatment should be prescribed by dose rather than time, and on-line integration of the irradiance to control the exposure should lead to more reproducible treatment. The ability of a unit to be fitted with both UVA and UVB lamps is a factor to be considered by clinical centers offering both PUVA and phototherapy treatment.
了解光疗和光化学疗法治疗设备的显著物理特性，将有助于任何构建自己设备的中心，或可能影响商业系统的选择。本文讨论了这些特性，并列出了不同的商业设备。荧光灯阵列是最常用的紫外线辐射源。用于PUVA的荧光灯光谱非常相似，但不同类型的UVB灯发射光谱之间存在临床上重要的差异。单位内灯管的数量和分布以及铝反射器的使用会影响辐照度的空间均匀性和大小。通常会发现这种反射器位于灯阵列后面，但封闭垂直柜体上方和下方的水平反射器常常被省略。单位内测得的辐照度取决于许多因素，比较规定的辐照度时必须谨慎。治疗应以剂量而非时间来规定，并且在线积分辐照度以控制照射应能实现更可重复的治疗。对于同时提供PUVA和光疗治疗的临床中心而言，设备配备UVA和UVB灯的能力是一个需要考虑的因素。
