Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The inspiratory lung volumes are decreased with resultant accentuation of the cardiomediastinal silhouette and bronchovascular crowding . Prominence of interstitial lung markings is similar to prior studies . Linear atelectasis or scarring at the left lung base is unchanged . There is no focal consolidation , pleural effusion or pneumothorax . The patient is status post median sternotomy with intact appearing wires . No acute osseous abnormality is detected .
    OUTPUT:
    
Low lung volumes . No acute cardiopulmonary process .