Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Two frontal upright views of the chest were obtained portably . Low lung volumes result in bronchovascular crowding . Increased retrocardiac density may represent atelectasis or pneumonia in the appropriate clinical setting . There is also increased density at the right heart border in the infrahilar region , which may represent vessels or infection . There is no pleural effusion or pneumothorax . Distortion of pulmonary vasculature suggests underlying chronic lung disease . Heart size is normal . Mediastinal silhouette is normal . A right internal jugular catheter courses into at least the distal SVC but distal aspect is not well seen due to underpenetration .
    OUTPUT:
    
1 . Retrocardiac opacity may represent atelectasis or infection in the appropriate clinical setting . Comparison with prior may be helpful . 2 . Right infrahilar opacity partially obscuring the right heart border may be vessels or pneumonia . 3 . Distal aspect of right internal jugular catheter is not well seen . Consider repeat radiograph .