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目的探讨3D-GRE SWI序列对颅内出血的诊断价值。方法对23例临床怀疑颅内出血,而常规MR头颅平扫SE序列T2WI、液体抑制反转恢复序列(FLAIR)未发现明确颅内出血灶或出血征象不明确者,进行前瞻性的3D-GRE SWI序列MR扫描。结果23例临床怀疑颅内出血的病例中,18例经手术及病理证实有颅内出血,3D-GRE SWI序列对18例颅内出血均得到明确显示,表现为点状、条状、类圆形或环形的低信号影,其中12例海绵状血管瘤合并不同时期的反复出血表现为均匀低信号(8例)或典型的低信号环,即“铁环征”(4例),2例急性脑梗塞合并少量渗血表现为“扇形”梗塞灶中的“点状”低信号出血灶。常规SE序列T2WI和液体抑制反转恢复序列(FLAIR)分别检出18例颅内出血中的10例、9例。结论3D-GRE SWI序列对颅内出血的敏感性高于常规SE T2WI序列和液体抑制反转恢复序列(FLAIR)。
Objective To investigate the diagnostic value of 3D-GRE SWI for intracranial hemorrhage. Methods 23 cases of clinical suspected intracranial hemorrhage, conventional MR head sweeping SE sequence T2WI, fluid suppression reversal recovery sequence (FLAIR) did not find a clear intracranial hemorrhage or bleeding signs are not clear, the prospective 3D-GRE SWI sequence MR scan. Results Of the 23 cases with intracranial hemorrhage, 18 cases were proved to have intracranial hemorrhage by operation and pathology. The 3D-GRE SWI sequence was clearly shown in 18 cases of intracranial hemorrhage, showing punctate, strip, round or ring Of which 12 cases of cavernous hemangioma with different periods of repeated bleeding showed uniform low signal (8 cases) or typical low signal ring, that is, “iron ring sign” (4 cases), 2 cases of acute Cerebral infarction combined with a small amount of bleeding showed “fan-shaped ” infarction in the “punctate ” low signal hemorrhage. Conventional SE sequence T2WI and fluid suppression inversion recovery sequence (FLAIR) were detected in 18 cases of intracranial hemorrhage in 10 cases, 9 cases. Conclusions 3D-GRE SWI is more sensitive to intracranial hemorrhage than conventional SE T2WI and FLAIR.