Blackwell C R, Amundson K D
Division of Radiation Oncology, Mayo Clinic, Rochester, MN 55905.
Med Dosim. 1990;15(3):127-9. doi: 10.1016/0958-3947(90)90050-r.
A low melting point cadmium free fusible lead alloy suitable for custom radiotherapy shielding blocks is described. The alloy, referred to here as Alloy-203, differs in composition from the more common Lipowitz's metal (Cerrobend) by being cadmium free, having a slightly higher lead content and a 203 degrees F melting temperature. Attenuation properties have been studied for 4-18 MV X-rays. Alloy-203 has lower transmission than Lipowitz's metal, primarily due to the higher content of lead and bismuth. Daily use for the past 2 years at Mayo Clinic has not indicated any major problems associated with the use of this cadmium free alloy for custom shield fabrication.
描述了一种适用于定制放射治疗屏蔽块的低熔点无镉易熔铅合金。在此称为合金 - 203的这种合金，其成分与更常见的里波维茨合金（赛柔本）不同，它不含镉，铅含量略高，熔点温度为203华氏度。已对4 - 18兆伏的X射线的衰减特性进行了研究。合金 - 203的透射率低于里波维茨合金，主要是由于铅和铋的含量较高。梅奥诊所过去两年的日常使用并未表明使用这种无镉合金进行定制屏蔽制造存在任何重大问题。
