【摘要】 目的 探讨3.0T MR扩散加权成像（DWI）特征表现在颅脑疾病中的应用价值。方法 本文回顾性分析应用DWI特征表现（脂肪抑制效应、T₂暗化效应、T₂穿透效应、T₂廓清效应）诊断出的颅脑疾病患者120例，全部行常规MRI扫描，包括平面回波扩散加权成像（EPI-DWI）和表观扩散系数（ADC）图。结果 利用脂肪抑制效应，诊断脂肪瘤15例，非脂肪成分病灶8例；利用T₂暗化效应诊断急性期脑血肿13例，出血性脑梗死11例，易漏诊的微出血或小的海绵状血管瘤16例；利用T₂穿透效应诊断表皮样囊肿15例，脉络丛囊肿5例；利用T₂廓清效应助诊脑后部可逆性脑病综合征15例，脑肿瘤22例。结论 全面广泛地运用DWI特征表现有助于颅脑疾病的诊断。更多还原

【Abstract】 Objective To explore the value of characteristic manifestation of diffusion-weighted images at 3.0T MR system in cerebral disease.Methods 120 patients with cerebral disease diagnosed by MR diffusion-weighted images（fat suppression effect, T₂ blackout effect, T₂ shine-through effect, T₂ washout effect） underwent routine MR scan, including echo planar imaging-diffusion weighted imaging（EPI-DWI） and apparent diffusion coefficient（ADC） map, whose characteristic manifestations of DWI were retrospectively analyzed. Results 15 cases of lipoma and 8 cases without fat lesions were diagnosed with fat suppression effect. 13 cases of acute cerebral hematoma, 11 cases of hemorrhagic cerebral infarction and 16 cases of micro bleeding of missed diagnosis or small cavernous hemangioma were diagnosed with T₂ blackout effect. 15 cases of epidermoid cyst, 5 cases of choroid plexus cyst were diagnosed with T₂ shine-through effect. 15 cases of posterior reversible encephalopathy syndrome and 22 cases of brain tumor were diagnosed with T₂ washout effect.Conclusion Comprehensive use of the characteristic manifestation of EPI-DWI and ADC map can help the diagnosis of cerebral disease.更多还原