Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is slightly larger than prior exam . Although still within normal limits and likely exaggerated due to the lower lung volumes , the mediastinal and hilar contours are within normal limits . The lungs volumes are low , exaggerating the bronchovascular structures , but there is no consolidation . There is no pleural effusion or pneumothorax . There is no subdiaphragmatic free air .
    OUTPUT:
    
Low lung volumes but no acute cardiopulmonary process and no subdiaphragmatic free air .