肺癌结节螺旋CT动态强化特点及其临床价值

Characteristics and clinical value of dynamic enhanced CT in lung cancer nodule

[目的]探讨以孤立结节为主要表现的肺癌的螺旋CT动态强化特点，并结合国内外文献讨论其临床意义。[方法]对比分析30例肺癌结节患者的螺旋CT动态增强扫描及自身CT平扫，重点观察原发灶动态增强各时相的CT值，根据CT值绘出动态增强曲线。[结果]30例肺癌结节增强后的CT值均随时间逐渐上升，峰值在1-3min内出现，到达峰值后缓慢下降，最大增强值均数为（31．4±10．3）Hu。[结论]肺癌结节螺旋CT动态强化特点是强化效应较明显，最大增强值多在20Hu以上，其时间-密度曲线为慢升慢降的抛物线型，这些强化特点具有一定的鉴别诊断价值。

[Objective] To evaluate the characteristics of dynamic enhanced CT in lung cancer nodule, and review related medical science literature to discuss its clinical value. [ Methods ] Collected and analyzed to the spiral CT dynamic en- hancement findings and it＇s routine scan findings of 30 lung cancer nodule cases, observe the CT values of the primary affection in each time ,and draw dynamic enhancement time-density curves. [Results] The average of the maximum CT values of the 30 cases was （31.4±10.3） Hu, the CT values was gradual increased and slowly decreased, the maximum value appears during the period of 1-3 min. [ Conclusion] The CT enhanced degree of lung cancer nodule is obvious,it＇s largest enhancement value is most more than 20 Hu, and the time-density curves looks as a parabola and showed a slowly progress and than decreased slowly, the dynamic enhanced characteristics have some useful in the differentiation diagnosis of solitary pulmonary nodule.