螺旋CT薄层重建技术对肺错构瘤的诊断价值

目的：探讨螺旋CT薄层重建技术对肺错构瘤的诊断价值。方法分析21例经手术病理证实的肺错构瘤患者,先行胸部常规CT扫描,再行CT薄层重建。观察2种图像上病灶的边缘特征及内部特征,将观察结果行卡方检验,以P<0.05为差异显著标准。结果常规CT与薄层重建图像比较：①分叶征的显示率相同,均为12例(57.1%)。②钙化的显示率相同,均为9例(42.9%)。③脂肪的显示率分别为3例(14.3%)和9例(42.9%),差异有统计学意义(χ2=4.200,P<0.05)。④常规CT与薄层重建对血管穿过征的显示率分别为3例(14.3%)和10(47.6%),差异有统计学意义(χ2=5.459,P<0.05)。结论 CT薄层重建较常规 CT能更好地显示肺错构瘤的内部特征,提高诊断正确率。

The diagnostic significance of thin layer reconstruction with spiral CT on the pulmonary hamartoma

Objective To investigate the diagnostic significance of thin layer reconstruction with spiral CT on the pulmonary hamartoma. Methods Accepted both routine CT examination and thin layer construction,2 1 pulmonary hamartoma cases confirmed by pathology were analyzed retrospectively.The margin and inner features of the lesions were observed and recorded.Significant analysis was performed by using SPSS17.0 Pearson chi-square test and Fisher exact test,with P<0.05 as the significant difference criterion.Results Comparison of the display rates by routine CT and thin layer reconstruction:①the same display rate of lobulation were 57.1%(12/21);②the same display rate of calcification were 42.9% (9/21);③the display rates of fat density were 14.3%(3/21)by routine CT and 42.9% (9/21)by thin layer reconstruction.The difference was statistically significant (χ2=4.200,P<0.05);④the display rates of blood vessel throughing were 14.3%(3/21)by routine CT and 47.6% (10/21)by thin layer reconstruction.The difference was statistically significant (χ2=5.459,P<0.05).Conclusion Displaying the inner features of pulmonary hamartoma better than routine CT,the thin layer reconstruction can improve the diagnostic accuracy significantly.