Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are stable . There has been interval slight decrease in the now small right pleural effusion , and the left pleural effusion has remained stable . The bilateral perihilar pulmonary consolidations are improved , but not resolved on the current study . Atelectatic changes at both lung bases are also present .
    OUTPUT:
    
Improvement in the right pleural effusion and perihilar opacities , which may be in keeping with pulmonary edema given the history of diuresis . However , hemorrhage and infection are still potential etiologies .