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目的：对比研究肺内大小结节ＣＴ导向穿刺活检诊断的精确性和安全性。方法：回顾性的分析５２例经ＣＴ导向穿刺活检和手术病理证实的病例。通过ＣＴ图像，我们把小于２．０ｃｍ结节列为小结节，大于２．０ｃｍ结节列为大结节。诊断精确性通过手术或尸检的组织学结果评价。每个病例记录气胸和肺出血和发生率。结果：大结节ＣＴ导向穿刺活检的精确性是８８％，小结节是６５％。两组间统计学有显著差异（Ｐ＜０．０５）。结论：ＣＴ导向穿刺活检大结节的精确性高于小结节，但两者的并发症同样是很低的
OBJECTIVE: To compare the accuracy and safety of CT-guided biopsy in the diagnosis of pulmonary nodules in size and size. Methods: A retrospective analysis of 52 cases of CT-guided biopsy and surgical pathology confirmed cases. By CT images, we ranked nodules smaller than 2.0cm as nodules and nodules larger than 2.0cm as macro nodules. The diagnostic accuracy is assessed by histological findings of surgery or autopsy. Pneumothorax and pulmonary hemorrhage and incidence were recorded in each case. Results: The accuracy of CT-guided biopsy of large nodules was 88% and that of small nodules was 65%. There was significant difference between the two groups (P <0.05). Conclusion: The accuracy of CT guided biopsy of large nodules is higher than that of small nodules, but the complication of the two is also very low