Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low , resulting in accentuation of the cardiomediastinal contours and crowding of bronchovascular structures . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is mildly enlarged but difficult to accurately assess due to relatively low lung volumes . Scar in inferior lingula unchanged .
    OUTPUT:
    
No acute cardiopulmonary process .