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目的：分析慢性持续性脑内出血的ＣＴ表现，并探讨其影像形成机理。材料和方法：２６例患者均作ＣＴ平扫及增强扫描，其中６例作了脑血管造影。结果：所有病灶均表现为由等或略高密度区环绕的类圆形高密度灶，病灶与正常脑组织间有低密度水肿带相隔。增强扫描病灶本身无强化改变。结论：慢性持续性脑内出血的典型ＣＴ表现为由等或略密高度区环绕高密度灶形成的脑内双重密度血肿，其高密度灶所在部位即病变血管所在。
Objective: To analyze CT manifestations of chronic persistent intracerebral hemorrhage and to explore its imaging mechanism. Materials and Methods: Twenty-six patients underwent CT scan and contrast-enhanced scan. Six patients underwent angiography. Results: All the lesions presented as round-shaped, high-density lesions surrounded by equal or slightly high density areas separated by low-density edema zones between normal and brain tissues. Enhancement of the lesion itself does not strengthen the change. CONCLUSION: The typical CT manifestations of chronic persistent intracerebral hemorrhage are double-density intracerebral hematoma formed by the contour of the isthmus or slightly hyperextension and the site of high-density lesions is the diseased vessel.