Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate interval removal of right internal jugular central venous catheter . Median sternotomy wires are intact . Lung volumes have improved with continued bibasilar opacities which could be atelectasis , but correlation for pneumonia is recommended due to the atypical appearance of the right base . Left pleural effusion is small . Enlarged cardiac size is stable . No pulmonary edema and improved pulmonary vascular congestion . Retrosternal opacity seen on the lateral view is likely post operative fluid or hematoma , unchanged . No acute pneumonia or pneumothorax .
    OUTPUT:
    
Bibasilar opacities which may represent atelectasis or pneumonia , correlation with clinical signs and symptoms is recommended . Small left pleural effusion . No pneumothorax .