Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior radiograph , pulmonary arteries appear enlarged , with perihilar interstitial markings , compatible with pulmonary edema . The heart size is normal . There is no pneumothorax , large pleural effusion , or focal consolidation . Partially imaged right shoulder hardware is unchanged since the prior chest radiograph .
    OUTPUT:
    
Interval development of mild pulmonary edema since ___ .