因为射线也穿过正常细胞,负作用也不小, 尽管剂量小.
另外,对射线加速器精度要求也很高,要定期校准.
因为射线也穿过正常细胞,负作用也不小, 尽管剂量小.
另外,对射线加速器精度要求也很高,要定期校准.
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