Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Lung volumes are slightly low resulting in bronchovascular crowding . Otherwise , the lungs are clear without focal consolidation , pleural effusion , or pneumothorax . Cardiac and mediastinal silhouettes and hilar contours are normal . No acute osseous abnormality is identified . There is no free air under the diaphragm .
    OUTPUT:
    
Normal chest radiographs .