Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low leading to crowding of the bronchovascular structures . There is no focal consolidation , pleural effusion , pneumothorax , or frank pulmonary edema . Mild prominence of the interstitial markings appears similar to prior . The cardiomediastinal silhouette is unchanged . Calcifications are noted at the aortic arch .
    OUTPUT:
    
Low lung volumes without focal consolidation .