锶~(90)皮肤敷贴器为单纯放出β射线的放射性同位素,物理半衰期为28年,故在短时间内剂量还是恒定的,(剂量每年的减少约为2.7%),锶~(90)放出一组β射线,以后衰变为钇~(90)(Y~(90)),钇~(90)再经β衰变后成为锆~(90)(Zr~(90)),后者为稳定元素。我院于1978年至1980年中应用锶~(90)皮肤敷贴器治疗5种局限性皮肤病,其结疗结果报告如下:一.病例选择本组病例均为皮肤科门诊病例,经检查 The strontium ~ (90) skin applicator is a purely radioisotope for beta-rays with a median half-life of 28 years, so the dose is constant over a short period of time (dose reduction is approximately 2.7% per year), strontium ~ (90) (90) (Y ~ (90)), and yttrium ~ (90) becomes Zr ~ (90) (Zr ~ (90)) after β decay, the latter is stable element. Our hospital from 1978 to 1980 the application of strontium ~ (90) skin applicator for the treatment of five localized dermatitis, the results of the treatment are reported as follows: I. Case Selection This group of patients are dermatology outpatient cases, after inspection