目的 比较分析CT、MRI对出 血性脑梗死(hemorrhagic cerebral infarction, HI)的诊断价值。方法 选取 我院2011年12月-2013年12月收治住院并 接受了CT、MRI检查的70例HI患者，结合 CT、MRI表现，按欧洲急性中风合作研究 分型进行CT分型，并以此分型为依据， 结合本组病例情况进行HI的MRI分型，比 较分析HI的CT、MRI特点。结果 依据CT 分型发现HI18例(25.71%)，而依据MRI分 型发现HI70例(100%)，可见MRI对HI的敏 感性明显大于CT(P＜0.05)。HI的CT表 现：脑梗死区为低密度影，岀血灶为高 密度影。梗死区MRI表现：梗死区T1WI呈 较低信号，T2WI呈高信号；出血灶MRI表 现：T1WI上超急性期、急性期、慢性期 以等或低信号为主，亚急性期以高信号 为主；T2WI及FLAIR上病灶在超急性期、 急性期、亚急性早期以低信号为主，亚 急性晚期、慢性期以高信号为主。出血 形态：CT表现为点状、线状、不规则斑 片状；MRI表现为“脑回状”、线状、 不规则斑片状。出血范围：相同患者同 一时期，CT显示的出血灶范围明显小于 MRI。结论 MRI能很好的显示不同时期的 HI，对HI的诊治及预后意义重大，诊断 HI较CT更为敏感，依据MRI分型的HI对临 床有更好的指导作用。

Objective To compare and analyze the diagnostic value of CT and MRI in hemorrhagic cerebral infarction (HI). Methods Seventy patients with HI from January 2011to December 2013 in our hospital were admitted to underwent CT and MRI, combined with the CT, MRI performance, to have the CT classification of HI according to the European cooperative acute stroke study, and on the basis, to have the MRI HI classification. The characteristics of different types of HT in CT and MRI were compared. Results Eighteen cases of HI were detected according to CT classification while 70 cases were discovered by MRI classification, the sensitiveness for HI of MRI was higher than CT(P＜0.05). The CT features of HI: the infarct area show as low density and the bleeding lesion show as high density. The MRI features of HI: the infarct area revealed hyperintensity and the bleeding lesion revealed hypointensity. The MRI features of bleeding lesion: it revealed mainly isointensity or hypointensity in hyperacute, acute, chronic phase and hyperintensity in subacute phase on T1WI. It revealed mainly hypointensity in hyperacute, acute, chronic phase and hyperintensity in late subacute phase, chronic phase on T2WI and FLAIR. The forms of bleeding: it showed as dotlike, filiform, irregular patchy form in CT and gyrus-like, filiform, irregular patchy form in MRI. The range of bleeding: the range of bleeding displayed in CT was smaller than MRI obviously in the same period of the same patient. Conclusion MRI is able to display HI of different periods which is significant to the clinical diagnosis, treatment and prognosis. MRI is more sensitive than CT in the diagnosis of HI. The MRI classification for HI is more available for clinical work.