Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , though there is probable mild pulmonary edema . An opacity in left lung base may be atelectasis or pneumonia . No pneumothorax is evident . Cervical spinal fusion hardware is partially imaged .
    OUTPUT:
    
New mild pulmonary edema and left lower lobe opacity , possible atelectasis or pneumonia .