Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are very low , exaggerating heart size and bronchovascular markings . Interstitial prominence is nonspecific and may represent mild edema . Retrocardiac opacity is new and may represent infection , aspiration , or atelectasis . No large pleural effusion or pneumothorax . Left upper and right lower lung chain sutures are stable .
    OUTPUT:
    
Mild interstitial prominence is nonspecific and may be related to low lung volumes or mild edema . Retrocardiac opacity is also nonspecific and may represent infection , atelectasis , or aspiration . Dedicated PA and lateral views would be helpful if the patient is able .