Linea junctionis posterior
Linea junctionis posterior
定义
后交界线（posterior junction line）由肺在食管后方、第3至第5胸椎前方相互贴合而形成。与前交界线类似，它由四层胸膜构成。
正常影像学表现：
后交界线表现为投影于气管内的细直线影。与前交界线不同，后交界线可见于锁骨上方。
据报道，后交界线可在32%的后前位胸部X线片中显示。
异常影像学表现：
该线出现异常膨出、弧形凸起或消失，提示后纵隔存在异常病变。锁骨上方肿块的侧缘形态可为判断肿块位置提供进一步线索。
与前交界线相同，周围肺组织的容积减少或过度充气亦可导致该线发生移位。
參考資料
Gibbs JM, Chandrasekhar CA, Ferguson EC, Oldham SA. Lines and stripes: where did they go?--From conventional radiography to CT. Radiographics. 2007 Jan-Feb;27(1):33-48. doi: 10.1148/rg.271065073. PMID: 17234997.
Marano R, Liguori C, Savino G, Merlino B, Natale L, Bonomo L. Cardiac silhouette findings and mediastinal lines and stripes: radiograph and CT scan correlation. Chest. 2011 May;139(5):1186-1196. doi: 10.1378/chest.10-0660. PMID: 21540217.
Cardiac silhouette findings and mediastinal lines and stripes: X-ray and computed tomography correlation R. Marano, G. Savino, C. Liguori, A. Meduri, L. Natale, L. Bonomo; Rome/IT CR-222 poster ECR 2009
Mediastinal lines, stripes and interfaces on PA chest radiograph with CT correlations - N. Bystrická, H. Poláková, J. Sykora; Bratislava/SKC-0442ECR 2013 10.1594/ecr2013/C-04
