Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly has been stable compared to exams dating back to ___ . There is mild perihilar vascular congestion , otherwise , the hilar and mediastinal contours are unremarkable . There appears to be an interval increase in mild - to - moderate pulmonary edema , right greater than left compared to the prior exam from ___ . There is no evidence of pleural effusion . No evidence of pneumothorax . The visualized osseous structures are unremarkable .
    OUTPUT:
    
Mild - to - moderate pulmonary edema .