1.Objective:To investigate the methods of locate curative position of tangent field in breast cancer isocenter irradiation.

1.探讨乳疗胸壁切线野等中心照射,确定等中心定位法。

2.Results After comparing the advantage and disadvantage of the old radiotherapy methods of whole centra nervous system,we think the isocenter irradi...

2.结果经对比分析,以数学记算法得出等中心照射技术较原有照射技术更合理。