Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right chest wall port is again noted . Relatively low lung volumes are seen with secondary crowding of the bronchovascular markings . There may be superimposed vascular congestion . There is left basilar atelectasis without confluent consolidation or effusion . The cardiomediastinal silhouette is stable . Prosthetic aortic valve and median sternotomy wires are again noted .
    OUTPUT:
    
Low lung volumes with possible superimposed pulmonary vascular congestion .