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。引入放射性致色膜，它具有胶片剂量测定的所有优点，而不需要湿式处理机，使这种胶片类型成为重要的剂量测定工具。EBT薄膜型作为早期MD-55型的一种更灵敏的替代型号被引入。后续EBT2型号的活性层含有由制造商添加的黄色标记染料，以纠正活性层厚度的细微差异。在之前的NSERC资助期间，我们已经大大改善了最新的EBT3放射变色膜模型的能量响应，该模型也具有对称结构和嵌入反牛顿环的功能，可以保护聚酯层。

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.