在景物中设置标准灰阶标板和彩色靶标，其目的是为了确定正确的曝光量和正片印制。
The use of standard gray scale and color targets in the scene is required for correct camera exposure and positive printing.
结论：低体重患者CT曝光参数的调整是必要的，以体重为依据进行曝光量设置是可行的。
Conclusin: Optimizing the exposing parameters for Low-weight patients CT scanning is necessary and feasible on basis of patients weight.
结论：低体重患者CT曝光参数的调整是必要的，以体重为依据进行曝光量设置是可行的。
Conclusin: Optimizing the exposing parameters for Low-weight patients CT scanning is necessary and feasible on basis of patients weight.
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