肺栓塞和下肢深静脉血栓的多层CT联合成像

Multi-slice CT in Pulmonary Embolism and Deep Venous Thrombosis

目的:探讨下肢深静脉血栓和肺栓塞的多层CT联合成像的诊断价值,并分析下肢深静脉血栓与肺栓塞的相关性。方法:对临床疑诊肺栓塞和/或下肢深静脉血栓的连续80例患者行CT肺动脉和下肢深静脉联合成像,采用16层CT,1.25mm×16模式采集,注射对比剂120ml,注射流率3～4ml/s,肺动脉延迟20～25s扫描,下肢静脉延迟150～180s扫描。结果:共发现下肢深静脉血栓52例55侧,肺栓塞21例37侧,其中肺栓塞和下肢深静脉血栓同时存在18例。结论:肺栓塞与下肢深静脉血栓关系密切,多层螺旋CT肺动脉和下肢静脉联合成像可一次性评价肺动脉和下肢静脉,是肺栓塞适宜的检查方法。

Objective：To study the value of multi-slice CT （MSCT） in the diagnosis of pulmonary embolism （PE） and deep vein thrombosis （DVT） of lower extremity and to analyze the relationship between PE and DVT of lower extremity.Methods：The consecutive 80 patients with suspected PE and/or DVT of lower extremity underwent pulmonary CT angiography （CTPA） and deep vein CT venography （CTV） of lower limb simultaneously.Using a 16-slice CT scanner,with 1.25mm×16i acquisition mode,the total volume of contrast medium was 120ml and the injection rate was 3-4ml/s.The delay time for CTPA and CTV of lower limb was 20-25s and 150-180s respectively.Results：Of the 80 patients,there was DVT of lower limb in 55 limbs （52 patients）,and PE was seen in 37 lungs （21 patients）.18 patients had both DVT of lower limb and PE.Conclusion：Pulmonary embolism was closely related with DVT of lower limb.CTPA in combination with lower limb CTV simultaneously could be obtained by MSCT,which is the technique of choice for patients with PE.