全脑放射治疗是多发脑转移瘤的基本放疗手段，立体定向放射治疗只适用于某些脑转移瘤患者。
Whole brain radiation is the basic method of multiple brain metastasis. Stereotactic radiosurgery is only applicable to some patients.
结论肺癌单发脑转移瘤患者的最佳治疗方式是单纯立体定向放射治疗，治疗失败后再行挽救性全脑照射或立体定向放疗。
Conclusion SRT alone is the optimal treatment for lung cancer with single brain metastasis, while saving WBRT or SRT is used after failure of SRT.
该定位定向系统不依靠GPS，中途无须停车作零速修正，是一种全自主的导航系统，具有定位定向精度高、机动性好、可靠性高和寿命长等优点。
The PADS presented is entirely autonomous, not reliable to GPS and ZUPT, and the system has high accuracy, fast reaction and high reliability.
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