CT增强动态扫描区分肺部良恶性病变的作用

The role of enhanced dynamic CT for differentiation pulmonary benign-malignant lesions

目的：探讨ＣＴ增强动态扫描区分肺部良恶性病变的意义。材料与方法：收集肺部结节样病变５９例，增强前后于病灶中部分别作系列薄层扫描，在各层面病灶密度偏高、中等、偏低处分别作进行ＣＴ值测量；强化明显的标准为ＣＴ值升高＞２０Ｈｕ。结果：恶性病变（４３例）多为强化明显，良性病变（１６例）多为强化不明显。统计学分析提示恶性病变增强前后之间的ＣＴ值差异有显著性意义（Ｐ＜０．００１）。而良性病变增强前后之间的ＣＴ值差异无显著性意义（０．１０＜Ｐ＜０．２０）。结论：ＣＴ增强薄层扫描之强化程度对区分肺部良恶性病变具有重要意义。

Purpose: To research the role of CT-enhanced dynamic scanning in the differential diagnosis of solitary pulmonary nodules. Methods: 59 cases of pulmonary nodule were examined with CT-enhanced dynamic scanning. Serial thin-section CT scans were obtained at middle of the lesions. For cach section we detected the attenuaton of the higher, middle and lower density areas. The criterion of obvious enhancement is that the CT values increases 20 Hu or more after contrast-injection. Results: 41 cases of malignancy showed an obvious enhancement while 14 cases of benign lesion didn't. The CT attenuation after enhancement were statistically higher than un-enhancement in malignancy (P<0.001), but ther was no stastistical difference in benign lesions (0.10<P<0.20). Conclusion: The degree of enhancement in CT-enhanced dynamic scanning is an important indicator for the benign-malignant differentiation of SPNs.