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Diagnostic value of fast breath-hold MRI techniques in aortic dissection
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF RADIOLOGY
- Issue:
- 8
- DOI:
- 10.3760/j.issn:1005-1201.2003.08.016
- Key Word:
- 动脉瘤,夹层;磁共振成像;磁共振血管造影术;图像增强
Abstract： 目的评价真实稳态快速梯度回波(true FISP)和三维增强MR血管成像(3D CE MRA)对主动脉夹层(AD)及并发病变的诊断价值.方法对连续113例临床上可疑或初诊为AD的患者进行了前瞻性true FISP和3D CE MRA检查.2位放射科医师彼此独立地分析全部MR图像,并与手术和其他影像学检查(包括DSA、经食管超声、CT和常规MRI)结果进行对照. 结果 113例中经true FISP和3D CE MRA检查诊断为AD者74例﹑胸主动脉瘤15例、主动脉粥样硬化伴附壁血栓5例和正常主动脉19例.与手术和其他影像学结果比较分析,true FISP和3D CE MRA对AD诊断的敏感度和特异度分别为98.6%和100.0%,100.0%和100.0%.74例中56例AD有内膜破口,1例内膜套叠,9例血栓闭塞性AD伴有溃疡样病变和8例主动脉壁间血肿.56例AD的59个内膜破口中true FISP显示37个(62.7%),3D CE MRA显示54个(91.5%),对内膜破口显示3D CE MRA明显优于true FISP(χ2=13.88,P<0.01 ). 74例345支主要分支血管中,2种MR技术总符合率为84.3%(291/345), 3D CE MRA的阳性检出率为29.3%, true FISP为22.0%. 结论 true FISP和3D CE MRA 2种快速屏气MR技术对AD的诊断是准确和可靠的,这2种MR技术明显优于常规MRI,尤其是对内膜破口和分支血管受累情况的显示.
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