我们的计划中不留有误差幅度。

There is no margin for error in our plan.

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在治疗计划系统中算出电离室所在区域的吸收剂量为计划剂量，按验证计划照射测量到的电离室吸收剂量为实测剂量，将二者进行比较得出误差。

Ionization chamber area dose calculated in TPS is plan dose, while the dose measured by ionization chamber according to QA plan is actual dose, Compare plan dose and actual dose then get the error.

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