Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . The heart is moderately enlarged , unchanged . Since the prior study , there has been interval development of indistinctness of the hilar pulmonary vasculature , and peribronchial cuffing , denoting underlying mild pulmonary edema . There is no pneumothorax or large pleural effusion . No focal airspace consolidation is identified . There is a small to moderate hiatal hernia
    OUTPUT:
    
Mild pulmonary edema and low lung volumes . Moderate cardiomegaly is stable .