摘要
目的探讨多层螺旋CT轴向负荷(ACE)检查对腰椎隐匿性中央椎管狭窄(OCSS)的诊断价值。资料与方法选择临床有神经根功能缺陷症状而常规CT(PRP)检查无明显神经根、硬膜囊压迫征象的50例患者进一步作PRP和ACE检查。分别测量下腰椎3个平面两种检查硬膜囊面积(DCSA)。结果50例中无椎间盘膨出(A组)33个平面,PRP检查未发现DCSA<75 mm2平面,负荷后3个平面DCSA<75 mm2。117个椎间隙伴椎间盘膨出或突出(B组),PRP检查8个平面DCSA<75 mm2,负荷后33个平面DCSA<75 mm2。负荷后B组OCSS明显多于A组(P<0.01)。结论多层螺旋CTACE检查能够发现PRP检查未能发现的OCSS,提高了椎管狭窄的诊断率。
Objective To evaluate the lumbar occult central spinal stenosis （OCSS） with muhi-slice spiral CT axial loading examination. Materials and Methods Multi-slice spiral CT under psoas-relaxed position （PRP）and axial compression in extension（ACE） was performed in 50 cases with neurogenic deficiency symptoms without distinct compression of nerve root and dural sac on conventional CT. The dural cross-section area（DCSA） of the three level of L3-4 ,L4-5 and L5 - $1 was measured with PRP and ACE respectively. Results Of 50 cases,33 planes without disc herniation were classified as group A and 117 planes with disc herniation were classified as group B. In group A, PRP showed no plane with DCSA 〈 75 mm^2 in, whereas ACE demonstrated 3 planes with DCSA 〈 75 mm^2. In group B, CT under PRP showed 8 planes with DCSA 〈 75 mm^2, but CT under ACE identified 33 planes with DCSA 〈 75 mm^2. CT under ACE demonstrated more cases with OCSS in group B than those in group A （ P 〈 0. 01 ）. Conclusion Multi-slice spiral CT axial loading examination can demonstrate OCSS which can not be detected on CT under PRP, contributing to detection of the lumbar spinal stenosis.
出处
《临床放射学杂志》
CSCD
北大核心
2008年第10期1374-1377,共4页
Journal of Clinical Radiology
