看不見的手術刀

才寫完 '醫師的水晶球' 一文，了解到三度空間放射治療不如一般想像容易，需要藉助精密的定位儀器。

隨即，就讀到 Varian Medical Systems 這家公司發出的新聞稿：

Brain Tumor Patients in Taiwan Receive Radiosurgery Treatments on World's Most Versatile Linear Accelerator

TAIPEI, Taiwan, Oct. 30 /PRNewswire-FirstCall/ -- Neurosurgeons and radiation oncologists at a leading cancer hospital in Taiwan are utilizing the world's most versatile medical linear accelerator to carry out highly precise intra-cranial stereotactic radiosurgery treatments. Patients at the Tzu Chi Buddhist Hospital in Taipei are benefiting from the latest in state-of-the-art radiotherapy treatments delivered using Varian Medical Systems' Trilogy™ accelerator. (more)

這台稱為 Trilogy™ 的直線加速器，台灣目前好像只有慈濟擁有。

我不懂這儀器哪裡與眾不同，只知道三度空間放射治療的第二個工具就是一把看不見的手術刀－放射線，想必這是一把很利的刀子。