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目的探讨多层螺旋CT血管造影(MSCTA)不同重组间距在肺动脉栓塞(pulmonary embolism,PE)中的诊断价值。资料与方法对36例经MSCTA检查的PE患者分别行10%、50%、70%横断位重叠重组,并将上述不同重组间距的横断位图像分别进行多平面重组(MPR)。比较不同重组间距的横断位图像及MPR图像对肺动脉栓子的显示情况。结果36例PE患者病变共累及肺动脉298支。对于主肺动脉及肺叶动脉栓塞,3种重组间距的横断位及对应的MPR图像栓子检出结果一致。但对于肺段及亚段动脉栓塞的显示,50%和70%重组间距的图像优于10%,差异有统计学意义(P<0.01),50%与70%重组间距的图像间差异无统计学意义(P>0.05)。结论MSCTA50%重组间距较10%重组间距的横断位图像能明显提高肺段、亚段PE的显示率,而进一步提高重组间距到70%意义不大。
Objective To investigate the diagnostic value of multi-slice spiral CT angiography (MSCTA) with different recombination intervals in pulmonary embolism (PE). Materials and Methods 36 cases of PETA examined by MSCT were overlapped and recombined in 10%, 50% and 70% of transverse transection, respectively. The images of transverse planes with different recombination intervals were respectively subjected to multiplanar reconstruction (MPR). Comparison of different reorganization interval of the transverse image and MPR images of pulmonary emboli show. Results Thirty-six PE patients involved 298 pulmonary arteries. For the main pulmonary artery and pulmonary embolism, the three kinds of recombination spacing of the transverse position and the corresponding MPR images embolism detection results. However, for pulmonary segment and sub-segment arterial embolization, the images of 50% and 70% of the recombination intervals were better than 10% (P <0.01), and there was no statistical difference between 50% and 70% Significance (P> 0.05). Conclusion The transection images of MSCTA with 50% recombination spacing and 10% recombination spacing can obviously improve the display rate of pulmonary segments and sub-segments of PE, and it is not meaningful to further improve the recombination spacing to 70%.