【单选题】【消耗次数：1】
CT术语“窗宽”的含义是
①
A.窗宽中心的CT值
②
B.窗宽两端的CT值
③
C.窗宽上限的CT值
④
D.窗宽下限的CT值
⑤
E.窗宽上下限之差的值
参考答案：
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相关题目
【单选题】
下列关于窗宽的概念，错误的是
①
窗宽规定了所显示灰阶的中心
②
窗宽规定了所显示CT值的范围
③
通常CT机的窗宽都是可调节的
④
窗宽越大，不同组织间的灰度对比越低
⑤
实际应用时，选择窗宽不包括所有组织的显示范围
【单选题】
关于CT值，下列哪一项错误
①
人为规定的数值
②
反映组织密度的相对值
③
范围在-1000至+1000
④
反映组织含水量
⑤
可以根据CT值对部分病变进行定性诊断
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