目的分析三维适形放疗(3dcrt)与立体定向放射外科(SRS)对于不能手术切除或拒绝手术治疗的脑胶质瘤的疗效。

Objective To analyze the result of the 3 dimensional conformal radiation therapy (3dcrt) and the stereotactic radiosurgery (SRS) for the glioma of the brain.

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目的：测定和分析三维适形及调强放疗的摆位误差，并依此计算CTV外扩PTV边界的大小。

Objective: To examine and analyze the set-up errors for patients with three dimensional conformal and Intensity Modulated Radiotherapy to calculate CTV referential safety margins of PTV.

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目的通过观察分析适形放疗病例的结果，探讨三维适形放疗对肺癌脑转移的临床意义。

Objective Through the observation of result of conformal radiotherapy, to explore the clinical significance of three dimension conformal radiotherapy to treat the brain metastasis of lung cancer.

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