The electron beams for total skin electron therapy (TSET) are often degraded by a scatter plate in addition to extended distances. For electron dosimetry, both the AAPM TG-51 and IAEA TRS-398 recommend the use of two formulas developed by Burns et al [Med. Phys. 23, 489–501 (1996)] to estimate the water-to-air stopping-power ratios (SPRs). Both formulas are based on a fit to SPRs calculated for standard electron beams. This study aims to find: (1) if the formulas are applicable to beams used in TSET and (2) the impact of the ICRU report 90 recommendations on the SPRs for these beams.

中文翻译：

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用于全皮肤电子治疗的电子束的停止功率比

用于全皮肤电子治疗 (TSET) 的电子束通常会被散射板除长距离外降解。对于电子剂量测定，AAPM TG-51 和 IAEA TRS-398 都推荐使用由 Burns 等人开发的两个公式 [Med. 物理。23, 489–501 (1996)] 来估计水对空气的制动力比 (SPR)。这两个公式都基于对标准电子束计算的 SPR 的拟合。本研究旨在发现：(1) 公式是否适用于 TSET 中使用的光束，以及 (2) ICRU 报告 90 建议对这些光束的 SPR 的影响。