实现这种效果具代表性地是采用固定、圆形的准直器，它能够产生边缘锐利、高适形的治疗射束。

This is typically achieved using fixed, circular collimators that produce sharp-edged, highly conformal treatment beams.

youdao

实现这种效果具代表性地是采用固定、圆形的准直器，它能够产生边缘锐利、高适形的治疗射束。

This is typically achieved using fixed, circular collimators that produce sharp-edged, highly conformal treatment beams.

youdao