【摘要】 目的 探讨不同层厚的CT肺血管成像(CTPA)对肺栓塞的诊断价值。方法 50例CTPA确诊的、准直为0.625 mm的肺栓塞患者,于工作站按1.25 mm、2.5 mm和5 mm层厚行无间隔重建,由2名影像学医师独立阅片,以0.625 mm层厚的CTPA为标准,分析不同层厚的CTPA的诊断结果及其对具体栓子的显示情况。结果 与0.625 mm层厚CTPA相对照,50例肺栓塞患者于1.25 mm、2.5 mm和5 mm层厚CTPA的漏诊率分别为4%、10%和20%,对具体动脉分支有无栓子的诊断一致性(Kappa值)分别为0.9、0.68和0.5,诊断符合率分别为84%、34%和0%。结论 1.25 mm层厚的CTPA与0.625 mm层厚的CTPA的诊断价值相似,因此,在工作站行CTPA重建时,重建层厚不应超过1.25 mm。更多还原

【Abstract】 Objective To discuss the diagnostic value of CT pulmonary angiography(CTPA) with different reconstruction thickness for pulmonary embolism(PE).Methods 50 cases with PE diagnosed by CTPA at 0.625 mm collimation.The primary CT data were reconstructed without interval at workstation and at thickness of 1.25 mm,2.5 mm and 5 mm respectively.The images of 0.625 mm were used as the disgnostic standard,the images were analysed by two radiologists independently.Results Based on CTPA images of 0.625 mm,the rates of missed diagnosis of PE by CTPA 1.25 mm,2.5 mm and 5 mm images were 4%,10% and20%,respectively,the diagnostic consistency(Kappa) was 0.9,0.68 and 0.5,and the coincindent rates were 84 %,34 % and 0 %,respectively.Conclusion The diagnostic value of CTPA with 1.25 mm image is similar with 0.625 mm thickness for PE,so that the reconstruction thickness of CTPA should not exceed 1.25 mm.更多还原