提出了一种新颖的直接体积CT扫描结构，即采用面状扫描与点状探测的倒置扫描结构。

This paper proposed a novel scanning structure of direct volume ct, which ADAPTS planar scanning and point detecting, called reverse geometry volume ct.

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PET扫描发现了脑部一个名为海马状突起(大脑侧面脑室壁上的隆起物，主要由灰白质构成，在泛记过程中起主要作用)的区域活性减弱的现象。

The PET scans detected reduced activity in an area of the brain called the hippocampus, which is known to be damaged in Alzheimer's.

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1年以后，大脑扫描显示，参加走步训练的人员海马状脑凸体平均增长了大约2%，而另一组人员却下降了大约1.4%。

After a year, brain scans showed that among the walkers, the hippocampus had increased in volume by about 2 percent on average; in the others, it had declined by about 1.4 percent.

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