目的 探讨大面积脑梗死患者的 CT、MRI表现及临床诊断价值。方法 选 取我院2010年2月至2015年2月的88例大 面积脑梗死患者进行CT和MRI诊断，分别 对12h，24h，72h内的患者进行CT、MRI 检查，比较CT和MRI检查的检出率及影像 学表现。结果 随着时间的延长CT检查的 患者脑组织水肿逐渐加重，梗死区域脑 组织密度不断下降；MRI检查的病灶T1WI 呈低信号，T2WI呈高信号，DWI呈明显 高信号，ADC图呈低信号；MRI的总检出 率(97.7%)明显高于CT(75.0%)，具有统 计学意义(P＜0.05)；MRI对入院后患者 12h，24h的的检出率(90.9%，100.0%)明 显高于CT(45.5%，60.0%)，具有统计学 意义(P＜0.05)；CT和MRI在72小时检出 率均为100%，没有显著差异(P＞0.05)。 结论 MRI检查大面积脑梗死患者的检出率 明显比CT高，可以准确的判定患者的发 病情况。

Objective To study the CT and MRI manifestation of large area cerebral infarction patients and the clinical diagnostic value. Methods From February 2010 to February 2015, Selected 88 cases patients with large area cerebral infarction of CT and MRI to diagnosis in our hospital , respectively for 12 h, 24 h, 72 h in the patients with CT, MRI, compared CT and MRI detection rate and imaging manifestations. Results As the extension of time CT examination of brain edema in patients had progressive, brain infarction area density of falling. MRI lesions T1WI low signal, T2WI showed high signal, DWI was obviously high signal, can the ADC figure had low signal; the total detection rate (97.7%) of MRI was obviously higher than that of CT (75.0%), with statistical significance (P<0.05), for hospital patients after 12 h, 24 h detection rate (90.9%, 100.0%) MRI were significantly higher than that of CT (45.5%, 60.0%), with statistical significance (P<0.05). CT and MRI detection rate was 100% in 72 hours, no significant differences (P>0.05). Conclusion The detection rate to the large area cerebral infarction were examined by MRI is higher than CT, can accurately determine the incidence of patients.