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 , which accentuate the bronchovascular markings . Given this , there may be mild pulmonary vascular congestion . No definite focal consolidation is seen . There is no large pleural effusion or pneumothorax .
    OUTPUT:
    
Low lung volumes which accentuate the bronchovascular markings , given this , there may be mild pulmonary vascular congestion .