Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Diffusely increased patchy airspace opacities likely reflect pulmonary edema , which appears slightly decreased since prior . No focal consolidation , pleural effusion or pneumothorax identified . The appearance of the cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
Pulmonary edema , minimally improved since the prior radiograph .