Conclusions: the beam Angle and the number of beams have influence upon dose distribution, the dose distribution would be improved for large volume target with the increment of beam number.
结论：照射野方向和照射野的数目对剂量分布有影响，增加照射野的数目可以改善体积较大的病灶的剂量分布。
The results showed that the DR's DNA double strand break damage caused by heavy ion beams could be repaired through culture, and the repairing time extended as the increment of radiation dose.
结果表明，抗辐射菌经重离子射线照射后所引起的DNA二条链的切断损伤经过培养能被修复；切断的DNA二条链的修复时间随着照射剂量的增加而延长；
The results showed that the DR's DNA double strand break damage caused by heavy ion beams could be repaired through culture, and the repairing time extended as the increment of radiation dose.
结果表明，抗辐射菌经重离子射线照射后所引起的DNA二条链的切断损伤经过培养能被修复；切断的DNA二条链的修复时间随着照射剂量的增加而延长；
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