Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Supine AP and lateral chest radiograph . Lung volumes are low with bronchovascular crowding in the lower lungs most pronounced in the left retrocardiac region . No large effusion or pneumothorax . The heart remains moderately enlarged . There is marked prominence of the azygos arch with rounded density again noted adjacent to the carina . Bony structures are intact . No displaced rib fracture is seen .
    OUTPUT:
    
1 . Stable prominence of the azygos arch . Stable cardiomegaly . 2 . No acute traumatic injuries .