Kendall B E, Radue E W
Br J Radiol. 1978 Aug;51(608):563-73. doi: 10.1259/0007-1285-51-608-563.
The typical computed tomographic (CT) features of a recent intracerebral haematoma are a homogenous region of increased attenuation surrounded by a well demarcated relatively narrow low attenuation ring (LAR). The pathology of the LAR is controversial, but it corresponds well with a zone of ischaemic necrosis which is observed around most intracerebral haematomas exmined at autopsy. Observations are made on spontaneous intracerebral haematomas and on blood samples which confirm that extravasated blood clot undergoes a variable degree of retraction which is completed within six hours. This suggests that the LAR in recent haematoma is due to damage caused by the greater volume of the precontracted haemorrhage on the surrounding brain. CT abnormalities in intracerebral haematomas were studied; features which were useful in distinguishing spontaneous haematomas and those which affected prognosis are discussed.
近期脑内血肿的典型计算机断层扫描（CT）特征是一个均匀的高密度区，其周围有一个界限清楚的相对较窄的低密度环（LAR）。LAR的病理情况存在争议，但它与在大多数尸检的脑内血肿周围观察到的缺血性坏死区域非常吻合。对自发性脑内血肿和血样进行了观察，结果证实溢出的血凝块会经历不同程度的收缩，且在6小时内完成。这表明近期血肿中的LAR是由于预收缩出血的较大体积对周围脑组织造成的损伤所致。对脑内血肿的CT异常进行了研究；讨论了有助于区分自发性血肿的特征以及那些影响预后的特征。
