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目的分析硬膜外造影后多排螺旋CT扫描(MSCTE)的影像学特点和对腰神经根管狭窄诊断作用。方法自2007年12月至2008年10月共完成了MSCTE检查29例,26例完成了CT、MRI和MSCTE三项检查,26例中23例进行了手术探查。分析MSCTE影像学特点,并与CT和MRI影像对比研究。进行CT、MRI和MSCTE三种影像诊断试验评价的灵敏度、特异度和总符合率统计学分析。结果MSCTE能很好地兼顾腰神经根管的骨与软组织界限。CT、MRI和MSCTE诊断神经根管狭窄的灵敏度依次为76.5%、88.2%和94.1%;特异度依次为60.0%、60.0%和80.0%;总的符合率依次为72.7%、81.0%和90.9%。MSCTE对腰神经根管狭窄诊断灵敏度、特异度和总符合率高于CT和MRI。结论MSCTE有其独到的影像学特点,在诊断腰神经根管狭窄方面优于CT和MRI。
Objective To analyze the imaging characteristics of multi-slice spiral CT (MSCT) after epidural angiography and to evaluate the diagnostic value of lumbar nerve root canal stenosis. Methods From December 2007 to October 2008, a total of 29 MSCTE cases were completed, 26 cases completed three examinations of CT, MRI and MSCTE, and 23 cases of 26 cases were performed surgical exploration. The features of MSCTE were analyzed and compared with CT and MRI images. The sensitivity, specificity and total coincidence rate of CT, MRI and MSCTE in three diagnostic imaging tests were statistically analyzed. Results MSCTE could well balance the bony and soft tissue boundaries of lumbar nerve root canal. The sensitivities of CT, MRI and MSCTE for diagnosing nerve root canal stenosis were 76.5%, 88.2% and 94.1%, 60.0%, 60.0% and 80.0%, respectively. The overall coincidence rates were 72.7%, 81.0% and 90.9% . MSCTE diagnosis of lumbar nerve root canal stenosis sensitivity, specificity and total coincidence rate higher than CT and MRI. Conclusion MSCTE has its unique imaging features, superior to CT and MRI in diagnosing lumbar nerve root canal stenosis.