目的阐明如何依据辐射项目实践审定的剂量的本值来实现防护与安全的最优化。方法用低于剂量约束值相应的空气比释动能率检测来表示。结果辐射项目防护剂量低于剂量约束值即是防护与安全的最优化。结论辐射项目剂量约束值可视项目实践而定,低于剂量约束值的均实现了防护与安全的最优化。 Objective To clarify how to optimize the protection and safety based on the actual dose of radiation project. The method is expressed as a measure of the air kerma rate below the dose constraint value. Results Radiation protection dose is lower than the dose constraint value is the optimization of protection and safety. Conclusion Radiation project dose constraint values ​​can be determined according to the project practice, and below the dose constraint values ​​are to achieve the protection and safety optimization.