Abstract：Objective To compare the accuracy of radiation dose of static and dynamic IMRT plans in the treatment of recal cancer. Methods The point dose verification and surface dose verification of static IMRT plans (12 cases) and dynamic IMRT plans (12 cases) which were implemented in our hospital were conducted with 2D ionization chamber array. Results According to 3%/3 mm criterion, the average passing rate of surface dose of 24 radiation fields of dynamic IMRT plans was 99.2% and that of static IMRT plans was 97.6%. The mean error of point dose of dynamic IMRT plans was 1.8% and that of static IMRT plans was 3.1%. Ther were significant differences between static and dynamic IMRT plans in terms of point dose (P＜0.05) and surface dose (P＜0.05). Conclusion Based on the normal operation of accelerators, both of static and dynamic IMRT plans can be used in the treatment of rectal cancer while the accuracy of radiation dose of dynamic IMRT plans was higher than that of static IMRT plans.
Fenkell L,Kaminsky I,Breen S,et al.Dosmetric comparison of IMRT VS.3D conformal radiotherapy in the treatment of cancer of the cervical esophagus[J].Radiother Oncal,2008,89(3):287-291.
