与肝硬化相关的周围肺血管扩张的CT征象

CT Features of Cirrhosis-Related Dilated Peripheral Pulmonary Vessels

目的研究与肝硬化相关的周围肺血管的扩张情况及其在CT图像上的影像表现。方法搜集满足条件的112例肝硬化患者组成肝硬化组,60例非肝硬化人员组成对照组,比较两组之间在胸部CT征象上有无统计学差异,比较内容包括:(1)肺血管纹理增粗达胸膜面;(2)双肺小结节影;(3)双肺底层面网格状影;(4)右肺底层面平均密度。征象(1)^(3)为计数资料,出现的记为阳性用1表示,没出现的记为阴性用0表示,征象(4)为计量资料,用CT值记录具体数值,随后采用SPSS 19.0统计软件包进行数据分析,计数资料用χ2检验,计量资料用t检验,检验水准为α=0.05。结果肝硬化组及非肝硬化组之间在上述4项CT征象上比较均有统计学差异,[征象(1):P=0.000,征象(2):P=0.002,征象(3):P=0.002,征象(4):P=0.000,均P<0.05]。结论肝硬化病变可通过某些途径影响肺周围血管,使之扩张,从而表现出不同的胸部CT征象。

Objective To study the dilatation of peripheral pulmonary vessels that is related to cirrhosis, and to discuss its CT features. Methods A total of 112 patients with cirrhosis, whose clinical conditions met the study requirements, were collected and were used as the cirrhosis group. Other 60 patients without cirrhosis were collected as the control group. CT scanning was performed in all the patients. CT findings were evaluated. The observation of CT images was focused on the following signs ： （ 1 ） the thickened pulmonary vascular markings adhered to the pleural surface ; （2） bilateral pulmona- ry tiny nodules; （3） reticular shadow at both lung base; the mean density of right lung bottom; （4） the mean density on the CT slice of the right lung bottom. Signs of （ 1 ）, （2） and （ 3 ） were counting data, which were recorded as “1” for pos- itive or “0” for negative; while sign （4） was measurement data, which was expressed by specific CT value. The data were analyzed by using SPSS 19.0 statistical software package. The counting data were analyzed by using X2 testing method, and the measurement data were analyzed by using t test. The statistically meaningful level was α = 0.05. Results Statistically significant differences in the incidence of above mentioned four CT signs existed between the cirrhosis group and the control group （ P = 0. 000, P = 0. 002, P = 0. 002 and P = 0. 000 respectively; P 〈 0.05 for all signs）. Conclusion Cirrhosis can affect the peripheral pulmonary vessels through certain ways, causing the dilatation of the vessels, thus different signs related to the dilated peripheral pulmonary vessels are displayed on the thoracic CT scans.