胸部肿块性病变的MR血管成像(MRA)

The Application of MR Angiography (MRA) of Intrathoracic Masses

目的：评价胸部ＭＲＡ的临床意义。材料与方法：本文搜集１９例胸部肿块病变，其中肺癌１４例，纵隔病变５例。１９例共行２０次ＭＲＩ及ＭＲＡ检查。常规ＭＲ成像序列为冠状Ｔ１ＷＩ、轴位Ｔ１ＷＩ和Ｔ２ＷＩ，在此基础上行ＭＲ血管成像（ＭＲＡ）。ＭＲ扫描机为ＧＥＳｉｇｎａ１．５Ｔ超导型，工作站：ＳＵＮＭｉｃｒｏｓｙｓｔｅｍＡｄｖａｎｔａｇｅＷｉｎｄｏｗ１，２，６。冠状ＭＲＡ在工作站上行最大强度投影（ＭＩＰ）重建。结果：ＭＲＡ显示血管异常１７例次，其中，血管弧形压迹８例次，狭窄５例次，截断３例次，移位１例次。结论：在肺ＭＲＡ上，血管受累可表现为闭塞或不规则狭窄或尖锥状狭窄，还可观察到血管受压推移的异常改变。

Objective: To evluate the role of MRA of intrathoracic masses.Materials and Methods: This paper collected 19 cases of intrathoracic mass. Fourteen cases were pulmonary malignant tumor, other cases the lesion were located in mediastinum. There were 20 MRI and MRA examination for 19 cases. Conventional sequences were coronary T 1WI,axial T 1WI and T 2WI. Then, on the basis of these sequences, had coronary MRA (16 times) and axial MRA (4 times). MR scanner was GE Signa 1.5 Tesla with workstation of SUN Microsystems Advantage Windows Software 1,2,6 Partial MRA were obtained with maximum intensity projection (MIP).Results: In 17 MRA, it revealed compressed, occlusion, displacement and irregular stenosis or distortion of vessels in 8,3,1,5 times, respectively.Conclusion: MRA can display the occlusion,irregular stenosis and displace of vessels of involved by tumor. It is useful in definition of the therapeutic strategy.