The objective is not simply to improve image resolution or signal-to-noise ratio; rather, it is to improve outcomes for individual patients and society at large.
目标并不是简单的提高图形分辨率或是信噪比率；确切的说，是给每个患者和社会带来更大程度的帮助。
3
This generally means it has an aspect ratio of 2:1 or larger, the image being at least twice as wide as its height.