MSCT肺动脉成像不同准直宽度对周围肺动脉显示率的对比研究  

Comparative Study of Different Collimation in Visualization of the Peripheral Pulmonary Arteries with MSCT Pulmonary Artery Angiography

作　　者：李芸芝[1] 周怀琪[1] 王刚[1] 张皓[1] 王浩[1] 卢星如[1] 包海荣[2] 田志勇[1] 

机构地区：[1]兰州大学第一医院放射科,甘肃兰州730000 [2]兰州大学第一医院呼吸科,甘肃兰州730000

出　　处：《临床放射学杂志》2013年第3期420-423,共4页Journal of Clinical Radiology

基　　金：甘肃省科技支撑计划项目(编号:090NKCA097)

摘　　要：目的采用MSCT不同准直宽度评价周围肺动脉的显示。方法搜集本院2011年9月至2011年12月行胸部增强扫描并符合纳入标准的病例80例,采用浓度300 mgI/ml对比剂50 ml,按照不同准直分为四组,64×0.6 mm(A:3 ml/s;B:5 ml/s),16×1.5 mm(C:3 ml/s;D:5 ml/s)分组,每组20例。统计分析5、6级肺动脉的显示率。结果 A与C组、B与D组肺动脉干、左肺动脉、右肺动脉、4级肺动脉平均CT值、4级肺动脉显示率比较无统计学差异(P>0.05);A和C组比较5级肺动脉下叶区有统计学差异(P<0.05);B和D组比较6级肺动脉上叶区和中/舌叶区有统计学差异(P<0.05)。结论 0.6 mm与1.5 mm准直对于亚段动脉的显示均良好,差异无统计学意义,而对于强化程度良好的5、6级肺动脉的显示有重要的意义。Objective To assess visualization of the peripheral pulmonary arteries of different collimation with MSCT. Methods 80 patients who met the inclusion criteria were detected by thoracic enhanced CT scan from Sep,2011 to Dec, 2011 in our hospital. These people were divided into four groups（20 cases in each） ,the collimation as 64 ×0. 6 ram（A：3 ml/s ;B ：5 ml/s）,16 ×1.5 mm（ C ：3 ml/s ;D： 5 ml/s） respectively,and 50 ml contrastm edium （300 mgL/ml） was used. Visualization of fifth and sixth branch of pulmonary arteries was analyzed. Results The differences of CT values of pulmo- nary trunk,left and right pulmonary arteris , the fourth branch of pulmonary arteris and the total number of the fourth branch of pulmonary arteris were no statistically significant （ P 〉 0.05 ） in group A and group C, group B and group D. There were statistically significant in the visualization of fifth branch of pulmonary arteries in lower lobe （ group A and group C） and sixth branch of pulmonary arteries in upper and middle/lingula lobe （ group B and group D） （ P 〈 0.05 ）. Conclusion The differences of visualization for the subsegmental arteries are no statistically significant in 0.6 mm and 1.5 mm collimation. Using 0.6 mm and 1.5 mm collimation are significance in well enhanced fifth and sixth branch of pulmonary arteries.

关 键 词：肺动脉 体层摄影术 X线计算机 

分 类 号：R816.2[医药卫生—放射医学]