Conclusions:( 1) Using the design method of block shielding faciocervical portals at isocentre, the individual portals can be designed according to the malignant invading ranges.
结论：（1）等中心面颈联合野设野原则可根据鼻咽癌侵犯的范围做个体化放疗设计。
Conclusions:( 1) Using the design method of block shielding faciocervical portals at isocentre, the individual portals can be designed according to the malignant invading ranges.
结论：（1）等中心面颈联合野设野原则可根据鼻咽癌侵犯的范围做个体化放疗设计。
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