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目的探讨不同层厚重建对64排螺旋CT肺动脉造影显示周围肺动脉能力的影响。方法资料回顾性分析2013年2月-2014年2月本院诊治的79例肺动脉栓塞患者64层螺旋CT肺动脉造影图像,按照不同层厚重建情况分为A(0.625mm)组、B(1.25mm)组、C(2.50mm)组、D(5.00mm)组,比较4组层厚肺动脉支数显示、部分容积伪影发生构成比及肺动脉连续性情况。结果 B组层厚段、亚段及5级、6级肺动脉支数显示率与C组、D组比较差异显著(P<0.05);4组部分容积伪影发生构成比比较差异有统计学意义(P<0.05);A组肺动脉分支中间及外周连续性与B组比较,无明显差异(P>0.05),但与C组和D组比较及C组与D组比较,差异显著(P<0.05)。结论不同层厚重建对64排螺旋CT肺动脉造影显示周围肺动脉能力不同,临床应用应结合患者肺实质病变情况,给予相应的层厚重建,从而提高肺栓塞的诊断水平。
Objective To investigate the effects of reconstructions with different slice thickness on the performance of 64-slice spiral CT pulmonary angiography. Methods Data of 79 cases of pulmonary embolism diagnosed in our hospital from February 2013 to February 2014 were retrospectively analyzed. The results of 64-slice spiral CT pulmonary angiography were divided into A (0.625mm) group, B (1.25mm) ), C (2.50mm) group and D (5.00mm) group. The thickness of pulmonary artery in four groups were compared. The proportions of partial volume artifacts and pulmonary continuity were compared. Results The display rate of pulmonary artery branch number in group B and group C was significantly lower than those in group C and group D (P <0.05). There was significant difference in the constituent ratio of partial volume artifacts between group B and group B (P <0.05). There was no significant difference between group A and group B (P> 0.05), but there was significant difference between group C and group D and between group C and group D (P <0.05) 0.05). Conclusion Reconstruction of different thickness reconstruction of 64-slice spiral CT pulmonary angiography shows different ability of the surrounding pulmonary artery, clinical application should be combined with the patient’s lung parenchymal disease, given the appropriate thickness reconstruction, thereby enhancing the diagnosis of pulmonary embolism.