摘要
目的:使用多层CT(MDCT)显示肺结节的细分叶征并探讨其在孤立性肺结节(SPN)诊断中的价值。方法:本组共收集CT横断面SPN最大直径≤30mm的病例62例,其中周围型肺癌32例,良性SPN30例,采用四层CT扫描仪对每个病例均完成容积显示(VR)处理并使用自主调节的模式进行显示。结果:肺癌的分叶征出现率为93.8%(30/32),明显高于非肺癌结节(良性SPN)[46.7%(14/30)],(χ2=16.660,P=0.001)。7例(21.9%)肺癌结节出现典型的细分叶征,其中肺泡癌4例,腺癌3例。无一例良性SPN出现细分叶征。典型的细分叶征表现为VR上肺结节表面有5个以上的微小半球形突起(直径不超过5mm),常规CT横断面不能显示该特征。结论:MDCT的VR图像可以很好地显示肺癌结节的细分叶征,该征可能是周围型肺癌的定性诊断特征。
Objective To appraise the fine lobulation sign in MDCT （multi-detector CT） imaging and its diagnostic value in solitary pulmonary nodule （SPN）. Methods Sixty-two cases of solitary pulmonary nodule with CT axial imaging diameter ≤ 30 mm,including 32 cases of peripheral pulmonary cancer and 30 cases of benign SPN were studied. Fourrow MDCT with 1.0 mm collimation,1.3 mm slice thickness,0.6 mm interval and 180-220 mm FOV （field of view） was used. VR （volume rendering） images with autogenous modulation were obtained in all of the cases. Results Lobulation sign was seen in 93.8% （30/32） of the pulmonary cancer cases,significantly higher than that in benign SPN （46.7%,14/ 30,χ^2 = 18.660,P = 0.001）. Seven （21.9%） of the pulmonary cancer cases showed typical fine lobulation sign,including 4 alveeolar cancer and 3 adenocarcinoma. None of the benign SPN case had fine lobulation sign. Typical fine lobulation sign was shown in VR images as more than 5 spherical spurs with a diameter ≤ 5 mm on the surface of SPN,which could not been seen on routine CT images. Conclusions VR image of MDCT could clearly display typical fine lobulation sign,which might be a characteristic sign for diagnosing peripheral pulmonary cancer.
出处
《诊断学理论与实践》
2010年第2期152-154,共3页
Journal of Diagnostics Concepts & Practice
关键词
周围型肺癌
孤立肺结节
容积显示
分叶征
诊断
Peripheral pulmonary carcinoma
Solitary pulmonary nodules
Volume rendering
Lobulation
Diagnosis
