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 lower than on the prior study , resulting ni bronchovascular crowding . There is no focal consolidation , pleural effusion or pneumothorax . Heart size is normal . Mediastinal silhouette and hilar contours are normal allowing for lung volumes . No displaced rib fractures identified . There is no free air under the diaphragm .
    OUTPUT:
    
No pneumonia , edema or effusion .