Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . Lung volumes are low , though allowing for this there is mild pulmonary interstitial edema without large effusions . The heart size is top normal . Mediastinal contour appears stable . No pneumothorax . Bony structures are intact .
    OUTPUT:
    
Normal heart size with mild interstitial edema .