A follow up CT scan showed that the dead brain tissue had filled up with blood. As the body digested the dead brain tissue, later scans showed a large hole in the left hemisphere.

他进了重症监护室，随后的CT扫描显示他死亡的脑组织已经被血液填满，待身体吸收了死亡的脑组织，之后的扫描显示他的左半脑有一个大洞。

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About 25% of patients in the study screened with a CT needed follow-up tests, which add to the expense.

此项研究中约25%受过CT扫描的病人需要继续检查。这需要更多的费用。

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The body needing to be examined is first scanned using a computed tomography (CT) machine, a process which takes about 20 seconds and creates up to 25, 000 images, each one a slice through the body.

需要进行尸检的尸体首先要用CT机进行扫描，这一过程需要20秒左右，然后会生成将近25000个图像——尸体的截面图像。

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Each point in each slice of a CT scan is essentially a separate test, and the chance that a whole body CT scan is going to turn up something somewhere that looks funny is nearly 100%.

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But the fact that centers were able to use at least one radiation-reduction technique in most patients "should serve as a wake-up call to cardiac CT laboratories that do not routinely use these methods, " Einstein writes in his editorial.

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He seemed to have developed an infection, but our X-rays and CT scans failed to turn up a source.

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