Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There relatively low lung volumes . Slight prominence of the interstitium is seen bilaterally which could be due to minimal interstitial edema although atypical infection is not excluded in the appropriate clinical setting . No lobar consolidation is seen . There is no pleural effusion or pneumothorax . Cardiac silhouette is top - normal . Mediastinal contours are unremarkable . Aortic knob calcification is seen .
    OUTPUT:
    
Low lung volumes . Slight prominence of the interstitium may be due to minimal interstitial edema although atypical infection is not excluded in the appropriate clinical setting . No lobar consolidation .