尽管如此，治疗时间不可避免地延长了：当更换时放射外科治疗必须中止，配置各个准直器的直线加速器必须围绕患者运动。
However, treatment will inevitably take longer: radiosurgery is paused whilst the exchange is performed and the linac must be moved around the patient with each collimator fitted.
我们应用立体定向等中心直线加速器放射神经外科共治疗脑胶质瘤23例。
We had treated 23 patients with brain glial tumors using stereotactic radiosurgery with an isocentric linear accelerator.
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