“三维适形放射治疗”的概念、定义、翻译、参考文献-科学参考

单词	三维适形放射治疗
释义	三维适形放射治疗 Encyclopedia 医学放射治疗释 3-dimensional conformal radiation therapy，3DCRT三维适形放射治疗利用患者电子计算机断层扫描（computed tomography, CT）图像重建三维的解剖结构，选择不同的入射方向，采用多叶光栅或铅挡形成与病变（靶区）形状一致的多个照射野，使得高剂量区剂量分布的形状在三维方向上与病变（靶区）的形状一致，同时使得病灶周围正常组织的受照剂量降低的放射治疗技术。
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