叶内型肺隔离症的双层螺旋CT诊断  

Value of multi-slice helical CT in diagnosis of intralobar pulmonary sequestration

作　　者：尉仲春 许存森[2] 蔡学祥[3] 

机构地区：[1]永康市第一人民医院放射科,浙江321300 [2]浙江大学医学院附属第二医院放射科 [3]浙江省人民医院放射科

出　　处：《放射学实践》2004年第10期727-729,共3页Radiologic Practice

摘　　要：目的 :总结叶内型肺隔离症的多层螺旋CT表现 ,探讨多层螺旋CT在肺隔离症诊断中的价值及扫描方法。方法 :6例肺隔离症患者行多层螺旋CT双期扫描。对比剂注射流率 2 .5ml/s ,扫描延时 2 5s ,层厚 3mm ,螺距 1.0。原始图像经 1.5mm薄层重建后再交工作站行三维图像后处理。结果 :本组中全部病灶均位于左肺下叶后基底段 ,表现为局部不规则肿块 ,其中 3例边缘光整 ,1例边缘不清 ,2例病灶周围血管纹理增粗。 6例均见异常供血动脉 ,发自降主动脉 4例 ,胸主动脉 2例。 6例中仅 4例显示引流静脉。其中多层螺旋CT三维图像后处理能清楚显示异常供血动脉和引流静脉 ,与术中所见完全一致。结论 :多层螺旋CT是肺隔离症定性诊断最为理想的非创伤性检查方法 ,其各种图像后处理技术能较好地显示肺隔离症的异常供血动脉和引流静脉 。Objective:To summarize the findings and to assess the value of multi-slice helical CT in the diagnosis of intralobar pulmonary sequestration (IPS),and to study the technique of CT scanning.Methods:Dual phases contrast-enhanced multi-slice helical CT was performed in 6 patients suspected of IPS.Three-dimensional images were reconstructed at the computer workstation.Result:All the lesions of 6 cases located at posterior basal segment of left lower lobe presented as irregular masses.3 of them had clear boundaries,while one case presented as an ill-defined nodule. Lung markings around the lesions increased in 2 cases.Helical CT identified the aberrant supplying arteryies in all cases and draining vessels in 4 cases.The origin of the anomalous artery was the thoracic aorta (n=2) and descending aorta (n=4).3D images could clearly show the supplying and draining vessels that were identical to the surgical findings.Conclusion:Multi-slice helical CT is helpful in diagnosis of IPS. In addition,MSCT reconstruction techniques are useful in demonstrating the supplying vessels,and this is of benefit to surgical planning.

关 键 词：支气管肺隔离症 体层摄影术 X线计算机 图像处理、计算机辅助 

分 类 号：R816.4[医药卫生—放射医学]