Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph obtained . There is peripheral reticular opacities which appear stable from prior exam which could indicate underlying interstitial lung disease . There is vague opacity at the left CP angle which is stable and is suggestive of scarring . No definite effusion or pneumothorax . No definite signs of CHF . Heart and mediastinal contours appear stable . Bony structures are intact with old deformity of the left mid clavicular shaft .
    OUTPUT:
    
Peripheral reticular opacities raise concern for underlying interstitial lung disease . No acute findings .