Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and CABG . There are low lung volumes and persistent elevation of the right hemidiaphragm . Mild left base atelectasis is seen . No definite focal consolidation is seen . There is no pleural effusion or pneumothorax . No overt pulmonary edema .
    OUTPUT:
    
Low lung volumes and persistent elevation of the right hemidiaphragm . No focal consolidation to suggest pneumonia . No pulmonary edema .