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在设计治疗计划时,对于任何一种新的射线,必须知道它的相对生物学效应。50年代末60年代初,高能量光子及电子线应用于放射治疗中,有关测定这些射线相对生物学效应及其与普通 X 线相比较的工作已经进行。但大多数 RBE 值是从单次高剂量照射中推导而来。对于临床经常使用的分割治疗,了解其 RBE 值是必要的。这是由于对高 LET(线样能量转换)射线其 RBE 值随着每次分割剂
When designing a treatment plan, you must know its relative biological effects for any new radiation. In the late 50’s and early 60’s, high-energy photons and electron beams were used in radiation therapy. The relative biological effects of these rays and their comparison with ordinary X-rays have been carried out. However, most RBE values are derived from a single high-dose exposure. For segmentation treatments that are often used clinically, it is necessary to understand their RBE values. This is due to the fact that for high LET (line sample energy conversion) rays its RBE value with each splitting agent