摘要目的：优化乳腺癌术后放疗靶区勾画方法，观察其对提高工作效率的作用。方法选取我科10名医师及随机抽取20例乳腺癌保乳术后患者，10名医师分别用对照组方法及研究组方法勾画20名乳腺癌术后患者的靶区，同时记录每次勾画所需时间。其中对照组方法为各医师惯用的日常勾画方法。研究组方法为优化后的靶区勾画方法。成组t检验组间差异。结果通过优化勾画方法，研究组平均用时小于对照组（51 min：65 min，P＝0．029）。对照组各医师勾画时间曲线相对平坦，研究组各医师勾画时间曲线则由高逐渐降低并趋于平坦。各医师对于各自熟练的勾画方法勾画时间相对稳定，而研究组经几例靶区勾画的熟悉后时间开始缩短，体现出明显的学习过程。结论优化后的乳腺癌靶区勾画方法是可行可靠的，且易于掌握，可提高医师工作效率，对既往勾画时间较长的医师尤为明显。

abstractsObjective To optimize the method for radiotherapy target delineation after breast cancer surgery, and to observe its advantage in raising work efficiency. Methods Ten physicians in our department were selected, and 20 patients who received breast?conserving surgery were randomly selected. The 10 physicians delineated the targets for these patients with the method in the control group and the method in the study group, and the time required for each delineation was recorded. The method in the control group was commonly used in daily practice and the method in the study group was optimized. The independent?samples t test was applied to compare the differences between the two groups. Results With the optimized method, the average time of delineation in the study group was less than that in the control group ( 51 min vs. 65 min, P=0. 029) . The time curves for delineation in the control group were relatively flat;the time curves for delineation in the study group were high at first, then decreased gradually, and finally became flat. The time for each physician to finish delineation skillfully was relatively stable, while in the study group, the time started to decrease after delineation for the first few patients, with an apparent learning process. Conclusions The optimized method for target delineation in breast cancer is feasible, reliable, and easy to master, and can increase work efficiency, which is more obvious in physicians with rich experience in delineation.