脑梗死的CT诊断(附360例分析)

CT diagnosis of cerebral infarction: Analysis of 360 cases

目的 :进一步探讨脑梗死的 CT表现。方法 :对 36 0例脑梗死患者平扫 35 2例 ,增强扫描 8例。结果 :36 0例检出梗死灶 418个。低密度 35 6例 ,混杂密度 4例。CT值 :发病 1周内 7～ 2 6 HU188例 ;1～ 2周 5～ 2 3HU10 0例 ;2～ 3周 18～ 32 HU2 8例 ;1～ 6个月 5～ 2 1HU2 4例 ;6个月以上 - 3～ 16 HU2 0例。最小梗死灶 0 .4cm× 0 .3cm;最大梗死灶累及一侧大脑半球。有占位效应 2 0例。结论 :脑梗死的 CT检出与发病时间相关 ;脑梗死的病理改变及 CT表现分为四期 :急性期 - CT阴性期 ;坏死期- CT阳性期 ;修复期 - CT“模糊效应期”;囊变期 -

Objective: To further evaluate CT manifestations of cerebral infarction Methods: Among 360 cases of cerebral infarction, 352 cases were performed by plain CT scans, 8 cases by contrast enchanced scans Results: 418 lesions of infaction were discovered among 360 cases 356 cases was hypodense, 4 cases was mixdense CT value: 7~26HU(n=188) during the first week of the disease onset; 5~23HU(n=100) between 1~12 week;18~32HU(n=28) between 2~3week; 5~21HU(n=24) between 1~6 month;3~16HU(n=20) over 6 months The minimal lesion was 0 4cm×0 3cm the maximal was cerebral hemisphere, mass effect in 20 cases Conclusion: Time of the disease onset was interrelated with CT discovery. There exist four phases of pathology and CT manifestations of cerebral infarction: acute phase-CT negative; necrotic phase-CT positive; repairable phase-CT blurred effect; cystic phase-CT cerebromalacia