Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is elevation of the left hemidiaphragm with overlying atelectasis , underlying subpulmonic effusion is not excluded . No definite focal consolidation is seen . Lung volumes are relatively low . There is no right pleural effusion . No evidence of pneumothorax is seen . The patient is status post median sternotomy and CABG .
    OUTPUT:
    
Elevation of the left hemidiaphragm with overlying atelectasis , subpulmonic effusion not excluded .