Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is at the upper limits of normal . The mediastinal and hilar contours appear unremarkable . The lungs demonstrate no lobar consolidation or evidence of heart failure , although mild pulmonary edema is present . There is no large pleural effusion or pneumothorax .
    OUTPUT:
    
Mild pulmonary edema but no evidence of lobar pneumonia .