Xenon computed tomography not only takes a picture of the brain, as does a traditional CT scan, but also allows doctors to measure exactly how much blood is flowing to different parts of the brain.

• 由计算机操作的氙气层面X线照相术不仅可以象传统的CT扫描仪那样拍摄下大脑的图像，还可以使医生精确地测量出到底有多少血液流回大脑的不同部位。