Cerenkov emission during electron radiotherapy had been emerging as a new dose assessment approach for clinical radiotherapy and could be imaged through a standard commercial camera. The purpose of this work aimed to study the accuracy of corrected Cerenkov emission method during electron radiotherapy by Monte Carlo (MC) method. GAMOS MC software was used to model the physics of electron therapy and calculated dose and Cerenkov photon distribution in water phantom. Compared to ionization chamber and diode measurement, MC simulated dose discrepancy was less than 1% in percentage depth dose (PDD) curves and less than.

2% in crossline profile curves, which was acceptable for clinical criterion. Compared to ionization chamber dose measurement, MC simulated Cerenkov discrepancy was less than 2% in crossline profile distribution, which was acceptable for clinical criterion. However, the Cerenkov PDD curves tended to overestimate the dose at the build-up region and underestimate the dose at the remaining attenuation region. After increasing the Cerenkov distribution depth to 2–3 mm, the discrepancy became well within 1% at the remaining attenuation region, which was acceptable for clinical criterion. Therefore, corrected Cerenkov emission could be used to assess PDD accuracy and crossline profile accuracy during electron radiotherapy.

电子放射治疗期间的切伦科夫发射已成为临床放射治疗的新剂量评估方法，并且可以通过标准商用相机进行成像。本工作旨在研究蒙特卡罗（MC）方法在电子放射治疗中校正切伦科夫发射方法的准确性。GAMOS MC 软件用于模拟电子治疗的物理过程，并计算水体模型中的剂量和切伦科夫光子分布。与电离室和二极管测量相比，MC 模拟剂量差异在百分比深度剂量 (PDD) 曲线中小于 1%，小于 1%。

2% 在crossline 剖面曲线，这是可以接受的临床标准。与电离室剂量测量相比，MC 模拟的切伦科夫偏差在横向剖面分布中小于 2%，这对于临床标准是可以接受的。然而，Cerenkov PDD 曲线往往高估了集结区的剂量而低估了剩余衰减区的剂量。将切伦科夫分布深度增加到 2-3 毫米后，剩余衰减区域的差异在 1% 以内，这对于临床标准是可以接受的。因此，校正的切伦科夫发射可用于评估电子放射治疗期间的 PDD 精度和横向剖面精度。