Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The inspiratory lung volumes remain low . Elevation of the right hemidiaphragm is unchanged , compatible with prior right lung resection . There is improved aeration of the left lung base without blunting of the costophrenic angle to suggest pleural effusion . There is increased opacification of the right lung , predominantly affecting the lower lung zone , which silhouettes the right hemidiaphragm and the right heart border . There is mild pulmonary vascular congestion . The cardiomediastinal silhouette remains prominently enlarged but stable compared to the remote prior study of ___ . Surgical clips are noted projecting over the right upper mediastinum . Hypertrophic degenerative changes of the thoracic spine are also noted .
    OUTPUT:
    
Increased opacification of the right lung , likely a combination of pleural fluid and underlying atelectasis . Given the mild pulmonary vascular congestion , this may represent fluid overload but given the recent history of trauma , injury is not excluded . If there is clinical concern for trauma , a non-contrast chest CT would be recommended for further evaluation .