This paper tried to compare CT and MRI target volumes for NPC and evaluated the role of the three-dimensional conformal RT(3-DCRT) in treating composite CT/MRI targets.

• 本研究的目的是比较CT和MRI来源的鼻咽癌肿瘤靶区，评价CT-MRI融合靶区容积应用于三维适形放射治疗时，对治疗剂量的影响。