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目的 探讨MR各序列在诊断脑干梗死时的作用及与CT比较MR在诊断中的优越性。方法 对 12 1例MR诊断脑干梗死的病例行常规SE序列T1WI、T2WI、PDWI扫描 ,6 4例加扫FLAIR序列 ,3例行弥散成像 ,6 8例于MR扫描前曾行CT扫描。结果 T2WI较T1WI显示病变更清晰且范围更大 ;FLAIR序列除能较清楚的显示病变外 ,尚有助于区分梗死的时期 ;而弥散成像则使发病在 6h内的超早期梗死灶的诊断成为可能。结论 无论从对脑干梗死的检出时间、检出率还是准确率方面来说 ,MR均较CT有着明显的优越性
Objective To investigate the role of MR sequences in the diagnosis of brain stem infarction and to compare the advantages of MR in the diagnosis of MR. Methods Twenty-one patients with MR brain infarction were examined by routine SE sequence T1WI, T2WI and PDWI, 64 cases with FLAIR sequence, 3 cases with diffuse imaging and 68 cases with CT scan before MR scan. Results T2WI showed more clear and wider lesions than T1WI. FLAIR sequence could not only distinguish the lesions clearly, but also help to distinguish the infarction period. Diffusion imaging made the diagnosis of ultra-early infarction within 6h may. Conclusions MR is superior to CT in terms of detection time, detection rate and accuracy of infarction of brainstem