Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low leading to crowding of the bronchovascular structures . The lungs are grossly clear without focal consolidation , pleural effusion , pneumothorax , or pulmonary edema . The heart size is top - normal . Mediastinal contours are grossly unremarkable . The cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
Low lung volumes without evidence for acute cardiopulmonary process .