Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no focal consolidation or pneumothorax . Trace left pleural effusion . Diffusely increased interstitial markings suggest mild pulmonary edema . Cardiomediastinal silhouette is mildly enlarged , as on prior . Imaged osseous structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
Mild pulmonary edema .