The gamma knife is a type of what we call stereotactic radiosurgery.

伽玛刀是一种立体定向放射外科手术。

So patients with recurrent tumors may have limitations with future radiosurgery treatments.

因此，复发性肿瘤患者未来的放射外科治疗可能会受到限制。

Once radiosurgery treatment has destroyed the tumor's cells, the body's natural cleaning mechanism kicks in.

一旦放射外科治疗破坏了肿瘤细胞，身体的自然清洁机制就会启动。

For several types of brain tumors, radiosurgery can be as successful as traditional brain surgery at destroying cancerous cells.

对于几种类型的脑肿瘤，放射外科手术在破坏癌细胞方面与传统脑外科手术一样成功。

In tumors called meningiomas, recurrence is found to be equal, or lower, when the patient undergoes radiosurgery.

在称为脑膜瘤的肿瘤中，当患者接受放射外科手术时， 发现复发率相同或更低。

Despite its innovations, radiosurgery isn't always the primary choice for all brain cancer treatments.

尽管有创新，放射外科并不总是所有脑癌治疗的首选。

This treatment is called stereotactic radiosurgery, and those light beams are beams of radiation: their task is to destroy tumors by gradually scrubbing away malignant cells.

这种治疗称为立体定向放射外科手术，那些光束就是辐射束：它们的任务是通过逐渐清除恶性细胞来摧毁肿瘤。

And compared to traditional surgery— often a painful experience with a long recovery period— radiosurgery is generally pain-free, and often requires little to no recovery time.

与传统手术（通常是痛苦的经历和漫长的恢复期）相比， 放射外科手术通常是无痛的，而且通常不需要恢复时间。