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急性脑血管病的死亡率是很高的,自开始应用CT以来,使诊断和鉴别以及疾病的预后起了显著的变化。本文着重对颅内血肿、蛛网膜下腔出血、脑梗塞三种常见的脑血管疾病的CT诊断价值和检查尚存在的问题作一简述。一、脑血管病CT一般病理现象(1) (一)脑水肿:急性脑血管病早期皆引起显著的脑水肿,从发病第1日开始,3～5日达高峰,2周以后逐渐消退。水肿的脑组织因含水份增加,CT象显示低密度,且非常一致。 (二)急性期颅内血肿CT象与血红蛋白浓度有密切关系。血液溢出血管,由于血浆被吸收,血红蛋白浓缩,因而吸收值较血管内的血液增高,且较正常脑组织高得多,一般CT象显示为50～80HF单位高密度象。
The mortality rate of acute cerebrovascular disease is very high, since the beginning of the application of CT, the diagnosis and differentiation as well as the prognosis of the disease has made a significant change. This article focuses on the CT diagnosis of intracranial hematoma, subarachnoid hemorrhage, cerebral infarction three common cerebrovascular diseases and check the existing problems are briefly described. First, the general pathology of cerebrovascular disease CT (1) (1) cerebral edema: acute cerebrovascular disease early caused significant cerebral edema, from the onset of the first day, reached a peak on the 3rd to 5th, and gradually dissipated after 2 weeks. Edema of the brain tissue due to increased moisture, CT images showed low density, and very consistent. (B) acute intracranial hematoma CT image and hemoglobin concentration are closely related. Blood spilled blood vessels, as the plasma is absorbed, hemoglobin concentration, and thus the absorption of blood increased compared with blood vessels, and much higher than normal brain tissue, the general CT showed 50 to 80HF units of high density like.