Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac size is normal . There are low lung volumes . Faint ill - defined opacities in the upper lobes and right mid lung are more conspicuous before . Left lower lobe minimal atelectasis are stable . There is no pneumothorax or large pleural effusion . Left central catheter tip is in the cavoatrial junction . Lung nodules are better seen in concurrent abdomen CT
    OUTPUT:
    
Faint ill - defined opacities in the upper lobes , differential diagnosis is broad could represent infection , aspiration . . There is no evidence of pulmonary edema