Changes

==Projectional radiography ("X-ray")=====Normal anatomy===<gallery heights=250 widths=250>File:Normal posteroanterior High-resolution computed tomograph of a normal thorax, axial plane (PA49) chest radiograph .jpg|link=Projectional radipgraphy of the thorax|[[Projectional radipgraphy of the thorax|Projectional radipgraphy ("X-ray").jpg|A normal posteroanterior (PA) chest radiograph.of the thorax]]File:Mediastinal structures on chest XHigh-rayresolution computed tomograph of a normal thorax, annotated.jpg|AnnotatedFile:Normal lateral chest radiograph axial plane (X-ray49).jpg|Normal lateral chest radiograph.File:Projectional rendering of link=CT scan of the thorax (thumbnail).gif|Projectionally rendered [[CTof the thorax]], showing the transition of thoracic structures between the anteroposterior and lateral view.