Some aspects of mediastinal anatomy and radiology

High kilovoltage technique in chest radiography increases the visualization of the air-soft tissue boundaries of the mediastinum. The pulmonary-soft tissue interfaces account for pre- and paravertebral lines. The paravertebral and pleural-azygos-esophageal, central, posterior, and anterior lines of pleural contact are described, and displacement, deformities, and separation of the pleural reflections are illustrated.