多螺旋CT各向同性扫描对肺孤立性病变的诊断价值

The role of multi-slice spiral CT isotropic scanning in detecting small pulmonary nodules

目的评估各向同性重建对肺孤立结节性病变的诊断价值,提高小结节的诊断水平。方法回顾性选择肺孤立小结节患者65例,其中为单螺旋CT检查患者32例(A组),为16层螺旋CT检查患者33例(B组),将2组的判读结果分别与病理结果对照。结果使用16层螺旋CT各向同性重建检查的患者诊断准确率与单螺旋CT检查患者相比无显著提高,但分叶征、毛刺征、棘状突起等征象的检出率明显增高(P<0.05)。结论尽管诊断准确率无明显提高,但各向同性重建对肺小结节的某些重要征象的检出具有明显的优势,从而增大了恶性结节的诊断水平。

Objective To evaluate the diagnostic value of Isotropic Scanning in Small Pulmonary Nodules （SPN） ,and to improve diagnostic level. Methods 65 patients who suffered from SPN were included in our study, in which 32 cases were examined by single-slice spiral CT（group a） and 33 cases were examined by multi-slice spiral CT （group b）. The results were compared with pathological diagnosis respectively. Results No significant difference（ P 〉 0.05） was found between single-slice spiral CT and multi-slice spiral CT in diagnostic accuracy, but more spiculated sign, lobulated sign and vessel convergence were found on isotropic scanning approach, and there were significant differences when compared with single-slice spiral CT scannings（x^2 = 4.484, P = 0.034;x^2 = 4.492, P = 0.034;x^2= 5.432, P = 0.02, respectively）. Conclusion Although there were no significant differences between the two approaches in correct diagnosises, Isotropic Scanning has some priorities in finding some important signs of SPN and the diagnostic accuracy of malignant nodules were improved.