Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright chest radiograph is obtained . Lung volumes are low . There is interstitial pulmonary edema without definite signs of pleural effusion , pneumonia , or pneumothorax . Cardiac silhouette appears top normal . The aorta is somewhat unfolded . Hilar vasculature is slightly engorged . Bony structures are unremarkable , though patient 's kyphotic posture limits evaluation .
    OUTPUT:
    
Cardiomegaly with mild pulmonary interstitial edema .