【摘要】 为描述和阐明经主动脉弓平面横断层、纵隔内结构的解剖学特征，为医学影像ＣＴ、ＭＲＩ提供解剖学依据，把经防腐固定的３０具成年男性尸体制成间距为１．２ｃｍ的连续横断层标本，进行观察。①主动脉弓和奇静脉弓在同一横平面占２０．００％±７．３０％，４０．００％±８．９４％的奇静脉弓在主动脉弓凹面平面；②８０．００％±７．３０％的主动脉上隐窝上界位于主动脉弓右前端头臂干起始处；③在主动脉弓平面，腔静脉后淋巴结位于主动脉弓、上腔静脉和气管之间，出现率为１００％；④在奇静脉弓平面，奇静脉弓淋巴结和主动脉上隐窝位于上腔静脉、奇静脉弓、气管和主动脉凹面所围成的气管前间隙内。结论：主动脉弓和奇静脉弓是识别主动脉上隐窝、淋巴结等结构的重要标志，它们在ＣＴ和ＭＲＩ影像学上具有重要的意义。更多还原

【Abstract】 The purpose of this study was to describe and explain the normal appearnces of aortic arch and its adjacent structures on the transaxial sections and to provide anatomical data for the diagnosis of CT and MR images. Dissections were performed on 1.2cm interval cross sections of the thorax of 30 embalmed cadavers. The results showed 20.00±7.30% of the aortic arch and arch of the azygos vein at the same plane and 40.00±8.94% of the arch of the azygos vein at the level of concavity of the aortic arch. 80.00±7.30% of the top of the superior aortic recess extended to the level of the aortic arch from which the branchiocephalic trunk arises. At the level of the aortic arch, 100% of the lymph nodes of superior vena cava were located among the aortic arch, superior vena cava and trachea. At the level of azygos vein, 100% of the lymph nodes of azygos vein and the superior aortic recess were located among the superior vena cava, arch of azygos vein, trachea and concavity of aortic arch. These data suggest that arotic arch and arch of azygos vein are the key structures to identify the superior aortic recess and lymph nodes. They are essential for understanding the related pathologic changes depicted on CT and MR images.更多还原