Although these images lack the spatial detail of volumetric data, they have the advantages of faster acquisition time and reduced amount of radiation exposure to both patients and doctors.

• 虽然这样的图像缺乏三维体数据的空间信息,但是它获取速度快并且能够减少患者和医生暴露在射线中的时间,将术中2D图像与术前体数据配准可以补偿一些空间信息。