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头颅CT值正常是多少
更新时间: 2020-11-05 00:00:00  

头颅CT值:脑皮质的ct值一般在30-40hu之间,脑髓质的ct值在28-32hu之间。

实际上CT值是CT图像中各组织与X线衰减系数相当的对应值。无论是矩阵图像或矩阵数字都是CT值的代表,而CT值又是从人体组织、器官的μ值换算而来的。CT值不是绝对不变的数值,它不仅与人体内在因素如呼吸、血流等有关,而且与X线管电压、CT装置、室内温度等外界因素有关,应经常校正,否则将导致误诊。

关键词: 头颅 ct 正常 多少

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