摘要
目的 用CT、MRI评价肺癌胸膜凹陷间隙内容物的性质 ,并探讨CT、MRI的应用价值。资料与方法 周围型肺癌 38例 ,影像、手术及大体病理均显示胸膜凹陷征。分别行CT平扫及增强扫描 ,MRI横断及冠状面T1WI、T2 WI及脂肪抑制成像。测量胸膜凹陷间隙内容物的CT值 ,分析MRI信号特点 ,并与手术及病理进行对照研究。结果 典型胸膜凹陷征 2 1例 ,凹陷间隙内CT值为 7.5 3± 6 .91HU ,符合水样密度。MRI上呈水样信号 ,脂肪抑制后T2 WI仍呈高信号 ;线状胸膜凹陷征 11例 ,仅 2例CT值示水样密度 ,MRT2 WI上 6例胸膜凹陷区见小三角形水样信号 ;叶间裂胸膜凹陷 4例 ,仅见于CT肺窗 ,局部无喇叭口状阴影形成 ,MRT2 WI上局部无水样信号改变 ;复合型胸膜凹陷 2例 ,其表现与以上所述相同。上述各型均于手术及大体病理显示脏层胸膜凹陷 ,局部胸膜光滑无增厚、无脂肪及软组织充填。CT、MRI对胸膜凹陷征内水的总显示率为 85 .3% ,与病理结果对照无显著差异 (χ2 =0 .2 0 6 ,P >0 .0 5 )。结论 CT及MRI进一步证实肺癌胸膜凹陷间隙内为水 ;CT及MRI基本能够反映胸膜凹陷的病理实质。
Objective To analyze the contents within the pleural indentation (PI) space in peripheral lung cancer by using CT and MRI, and to evaluate CT and MRI in assessing PI.Materials and Methods Both plain and enhanced CT scanning, and both axial and coronal section of T 1WI, T 2WI and fat suppressed T 2WI were performed in 38 cases of peripheral bronchogenic carcinoma carrying PI sign. CT values and MRI signal features of the contents within the space of PI was measured and analyzed. The results were compared with the pathological findings.Results Typical PI was seen in 21 cases, the contents within PI space had a CT value of 7.53(6.91Hu, being in accordance with water density. On MRI, it showed signals of water, presenting higher signal on fat suppressed T 2WI. Of 11 cases with linear type PI, CT value of water density was seen in only 2, while signal of water on T 2WI and fat-suppressed T 2WI was seen in 6. PI of interlobar fissure, presenting as a linear shadow between the lesion and the interlobar fissure, was found in 4 cases, which was revealed only on CT images with lung window and no water signal was demonstrated on T 2WI. Complex PI was seen in 2 cases, displaying the similar signs as described above. Pathologically, the pleura around PI site was smooth without thickening, and no fat or soft tissue was found within PI space. The total displaying rate of the water within the PI space on CT and MRI was 85.3%, and the difference was not significant between the above two images and the pathologic results (χ 2=0.206, P>0.05).Conclusion This study makes a further confirmation that the contents within the PI space is water. On the whole, CT and MRI can reflect the pathologic nature of PI.
出处
《临床放射学杂志》
CSCD
北大核心
2002年第5期344-347,共4页
Journal of Clinical Radiology
