Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest provided . There is a mild atelectasis of the left lung base . Blunting of the right costophrenic angle could be due to a trace right pleural effusion . No focal consolidation , or pneumothorax . There is prominent superior right mediastinal contour , likely from the tortuosity of great vessels as seen on the C - spine CT of the same day . The cardiac silhouette is normal . Imaged bones are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
Mild atelectasis of the left lung base and possible trace right pleural effusion .