磁敏感加权成像在颅内出血诊断中的应用(1)
摘要:目的:探讨磁敏感加权成像(SWI)对颅内出血的诊断价值。方法:对30例临床怀疑颅内出血,而常规MRI头颅平扫TSE序列 T2 WI、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 SWI序列 MR扫描。结果:30例临床怀疑颅内出血的病例中,20例经手术及病理证实有颅内出血,SWI序列对 20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 14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 TSE序列 T2 WI和液体抑制反转恢复序列(FLAIR)分别检出 20例颅内出血中的9例和11例。结论:磁敏感权成像(SWI)对颅内出血的敏感性高于常规 TSE序列T2 WI序列和液体抑制反转恢复序列(FLAIR)。
关键词:磁共振成像; 磁敏感加权成像;脑出血
[abstract] objective:to explore the diagnostic value of susceptibility weighted imaging(SWI)in intracranial hemorrhage.Methods:30 cases of clinical suspected intracranial hemorrhage,and conventional MRI head scan TSE sequence T2 WI,liquid restrain inversion recovery(FLAIR)sequences found no clear focal intracerebral haemorrhage or signs of bleeding is not clear,prospectie SWI sequence of MR scan.Results:30 cases of clinically suspected cases of intracerebral haemorrhage,20 cases have intracranial hemorrhage confirmed by surgery and pathology,SWI sequence of 20 cases of intracranial hemorrhage were clearly show,show the dot,strips,round or circular low signal,including 14 cases of cavernous hemangioma with different period of recurrent hemorrhage characterized by uniform low signal(8 cases),or the typical low signal,namely "the ring"(4 cases),2 cases of acute cerebral infarction merger of a few ooze blood performance for the "dot" in the "fan" infarct low signal hemorrhage stove.Conventional TSE sequence T2 WI and fluid suppression reversal recovery sequence(FLAIR)detected 9 cases and 11 cases of intracranial hemorrhage in 20 cases,respectively.Conclusion:susceptibility of SWI to intracranial hemorrhage is higher than conventional TSE sequence T2 WI sequence and fluid inhibition reversal recovery sequence(FLAIR).
Key words:Magnetic resonance imaging;Susceptibility weighted imaging;Cerebral hemorrhage
笔者对30例临床怀疑颅内出血的病例进行磁敏感加权成像及常规序列对照研究,探讨磁敏感加权成像(SWI)对颅内出血的诊断价值。
1 材料与方法
1.1 一般资料 2017-01—2018-01,30例临床怀疑颅内出血的病例,进行常规MRI头颅平扫、SWI序列扫描及Gd-DTPA增强扫描。30例患者中,男16例,女14例,年龄21~85岁,平均46岁。临床症状有癫痫、头晕头痛、肢体麻木、感觉障碍、偏瘫等,病程1d~5年。
1.2 MRI检查 采用 西门子1.5T MR扫描儀,头颈正交线圈,对 30例患者分别行常规 SE序列、液体抑制反转恢复序列(fluidattenuatedinversionrecovery,FLAIR)、SWI扫描及 Gd-DTPA增强扫描。扫描序列包括:常规 SE序列 T1 WI和TSE序列 T 2 WI横断面、FLAIR冠状面和矢状面;SWI序列及SE序列的增强 T1 WI横断、冠状和矢状面。SE序列 T 1 WI扫描参数为 TR550 ms,TE9 ms;T2 WI扫描参数为 TR4500ms,TE90 ms;层厚 5 mm,层距 0.5 mm。FLAIR序列参数为 TR7500 ms,TE120 ms,TI2300 ms。
1.3 影像分析及统计学处理 由2名医师盲法比较平扫TSE序列T2WI、FLAIR及SWI上有无病灶,病灶内或病灶周围有无出血表现,并与病理学进行对照。出血的分期根据出血后时间划分,超急性出血为出血后6h以内,急性期为出血后7~72h,亚急性期为出血后4d~2周内,慢性期为出血2周后。SWI、T2WI及FLAIR之间对出血灶检出率的比较使用χ2检验,使用统计学软件包SPSS13.0,P<0.05为具有统计学意义的标准。, 百拇医药(黄略 陈玉芳 秦培鑫)
关键词:磁共振成像; 磁敏感加权成像;脑出血
[abstract] objective:to explore the diagnostic value of susceptibility weighted imaging(SWI)in intracranial hemorrhage.Methods:30 cases of clinical suspected intracranial hemorrhage,and conventional MRI head scan TSE sequence T2 WI,liquid restrain inversion recovery(FLAIR)sequences found no clear focal intracerebral haemorrhage or signs of bleeding is not clear,prospectie SWI sequence of MR scan.Results:30 cases of clinically suspected cases of intracerebral haemorrhage,20 cases have intracranial hemorrhage confirmed by surgery and pathology,SWI sequence of 20 cases of intracranial hemorrhage were clearly show,show the dot,strips,round or circular low signal,including 14 cases of cavernous hemangioma with different period of recurrent hemorrhage characterized by uniform low signal(8 cases),or the typical low signal,namely "the ring"(4 cases),2 cases of acute cerebral infarction merger of a few ooze blood performance for the "dot" in the "fan" infarct low signal hemorrhage stove.Conventional TSE sequence T2 WI and fluid suppression reversal recovery sequence(FLAIR)detected 9 cases and 11 cases of intracranial hemorrhage in 20 cases,respectively.Conclusion:susceptibility of SWI to intracranial hemorrhage is higher than conventional TSE sequence T2 WI sequence and fluid inhibition reversal recovery sequence(FLAIR).
Key words:Magnetic resonance imaging;Susceptibility weighted imaging;Cerebral hemorrhage
笔者对30例临床怀疑颅内出血的病例进行磁敏感加权成像及常规序列对照研究,探讨磁敏感加权成像(SWI)对颅内出血的诊断价值。
1 材料与方法
1.1 一般资料 2017-01—2018-01,30例临床怀疑颅内出血的病例,进行常规MRI头颅平扫、SWI序列扫描及Gd-DTPA增强扫描。30例患者中,男16例,女14例,年龄21~85岁,平均46岁。临床症状有癫痫、头晕头痛、肢体麻木、感觉障碍、偏瘫等,病程1d~5年。
1.2 MRI检查 采用 西门子1.5T MR扫描儀,头颈正交线圈,对 30例患者分别行常规 SE序列、液体抑制反转恢复序列(fluidattenuatedinversionrecovery,FLAIR)、SWI扫描及 Gd-DTPA增强扫描。扫描序列包括:常规 SE序列 T1 WI和TSE序列 T 2 WI横断面、FLAIR冠状面和矢状面;SWI序列及SE序列的增强 T1 WI横断、冠状和矢状面。SE序列 T 1 WI扫描参数为 TR550 ms,TE9 ms;T2 WI扫描参数为 TR4500ms,TE90 ms;层厚 5 mm,层距 0.5 mm。FLAIR序列参数为 TR7500 ms,TE120 ms,TI2300 ms。
1.3 影像分析及统计学处理 由2名医师盲法比较平扫TSE序列T2WI、FLAIR及SWI上有无病灶,病灶内或病灶周围有无出血表现,并与病理学进行对照。出血的分期根据出血后时间划分,超急性出血为出血后6h以内,急性期为出血后7~72h,亚急性期为出血后4d~2周内,慢性期为出血2周后。SWI、T2WI及FLAIR之间对出血灶检出率的比较使用χ2检验,使用统计学软件包SPSS13.0,P<0.05为具有统计学意义的标准。, 百拇医药(黄略 陈玉芳 秦培鑫)