Cheng P C, Ames T, Howard-Ames T, Kohut H, Heleba V, Krishnamoorthy J
Albany Regional Radiation Oncology Program, Cooperative Program of Albany Medical Center Hospital, St. Peter's Hospital, Albany, NY 12208.
Med Dosim. 1989;14(1):35-6. doi: 10.1016/0958-3947(89)90135-0.
Tangential breast fields always "flash" beyond the surface of the patient. Since the portion of the beam that is in air does not contribute scatter, external beam treatment planning computers that utilize stored beam data can lead to dose errors of up to 10%. These errors can be reduced by using an irregular field calculation program to adjust the monitor units to account for the loss of scatter.
乳腺切线野总是会“闪现”到患者体表之外。由于位于空气中的那部分射线束不会产生散射，利用存储的射线束数据的外照射治疗计划计算机可能会导致高达10%的剂量误差。通过使用不规则野计算程序来调整监测单位以考虑散射损失，可以减少这些误差。
