Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes which accentuate the cardiomediastinal silhouette and bronchovascular structures . Widening of the mediastinum is also likely related to post surgical changes . A chest tube is seen in the left lung . No focal pulmonary consolidations are identified . There is no pneumothorax .
    OUTPUT:
    
Post - surgical chest radiograph with low lung volumes and no evidence of pneumothorax .