Patients i n the LCAF group received conventional fractionation radiotherapy of 1.8 ? Gy per fr action to a dose of 41.4? Gy/23 f/4.6 wks , followed by accelerated fraction ation irradiation using reduced fields, twice daily at 1.5?

• LCAF组开始为常规分割 1 .；8Gy/次；1次 /d；5d/周；照射至 41