ABSTRACT
Objeetive To study the application of template in intensity modulated radiotherapy (IMRT)planning.Methods With Philips Pinnacle3(R) version 7.6c treatment planning system(TPS) platform.a template for left breast cancer's IMRT planning was customized by using the function of scripting.Ten patients received IMRT alone after breast-conserving surgery were selected,two IMRT plans were designed for each patient:individual plan and the plan based on the template.Dose parameters of target,including conformal index(CI)and homogeneity index(HI),dose-volume histogram parameters,including V30,V20 of lung and cardiac,and the planning time were compared respectively.Results Of the two IMRT plans based on the template method and individual method.The average time of design an IMRT plan were 7±0.82 min and 36.5±6.84 min(t=13.55,P=0.000),the PTV average CI were 0.851± 0.015 and 0.845±0.032(t=0.59,P=0.560),the PTV average HI were(13.2±1.3)%and(14.4±1.6)%(t=1.804,P=0.08),the lung average V30 were(8.80±0.53)%and(8.31±0.74)%(t= cardiac average V30 were(9.89±1.14)%and(9.66±1.43)%(t=0.41,P=0.688).Conclusion For the tumor with the same location and stage,the application of template can simplify planning process and reduce working time,which was worthy of expansion.