Lax I
Department of Hospital Physics, Karolinska Hospital, Stockholm, Sweden.
Phys Med Biol. 1991 Jul;36(7):963-72. doi: 10.1088/0031-9155/36/7/005.
Beta emitting 106Ru-applicators are used to treat choroidal melanoma. In order to improve the accuracy and simplify the dosimetry of these applicators, the suitability of using a p-type silicon semiconductor detector has been investigated. The detector is calibrated in a low energy electron beam. An important property of the detector for this application is that the linear scattering power of the epoxy resin that surrounds the silicon crystal is within 1% of that for water, in the energy interval of interest. Furthermore the variation in the mass collision stopping power ratio water to silicon is within 4% in this energy interval. The accuracy of the dose-rate measured with the detector is about 5% for this application.
发射β射线的106Ru敷贴器用于治疗脉络膜黑色素瘤。为了提高这些敷贴器的准确性并简化剂量测定，人们研究了使用p型硅半导体探测器的适用性。该探测器在低能电子束中进行校准。对于此应用而言，该探测器的一个重要特性是，在感兴趣的能量区间内，围绕硅晶体的环氧树脂的线性散射能力与水的线性散射能力相差在1%以内。此外，在该能量区间内，水与硅的质量碰撞阻止本领比的变化在4%以内。对于此应用，用该探测器测量的剂量率精度约为5%。
