Advanced Radiochromic Film Based Dosimetry Techniques in Radiation Therapy and Diagnostic Radiology

胶片剂量学已发展成为放射治疗验证和质量保证的有力工具。放射变色胶片的推出具有胶片剂量测定的所有优点，而不需要湿处理机，使这种胶片类型成为重要的剂量测定工具。EBT薄膜模型已被引入，作为较早的MD-55模型的更敏感的替代。后续EBT2型号的有源层包含制造商添加的黄色标记染料，以校正有源层厚度的细微差异。在之前NSERC资助的赠款期间，我们大幅改善了最新EBT3辐射变色薄膜模型的能量响应，该模型也具有对称结构，并在保护聚酯层中嵌入了反牛顿环功能。

Film dosimetry was developed into a powerful tool for radiotherapy treatment verification and quality assurance. Introduction of radiochromic film having all advantages of film dosimetry without the need for wet processors make this film type an important dosimetric tool. The EBT film model has been introduced as a more sensitive alternative to the earlier MD-55 model. Active layer of subsequent EBT2 model contains a yellow marker dye added by manufacturer to correct for subtle differences in active layer thickness. During previously NSERC funded grant we have substantially improved the energy response of the latest EBT3 radiochromic film model, which also has a symmetric structure and embedded anti-Newton rings feature within protecting polyester layers.