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1.The lead collimator was used to align the patient's head with the X-ray beam.
铅准直器被用来将患者的头部与X射线束对齐。
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2.During surgery, the lead collimator is used to shield the patient from radiation.
在手术期间，铅准直器用于保护患者免受辐射。
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3. The lead collimator was designed to minimize patient exposure to radiation during treatment.
铅准直器的设计旨在在治疗过程中最小化患者对辐射的暴露。