Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Diffuse interstitial abnormalities along with micronodular opacities in the lung peripheries likely represent scaring . Previously seen left upper lobe nodule is not well appreciated on today 's film . There is no consolidation or pleural effusion . There is no pneumothorax . Heart size is normal . No hilar or mediastinal enlargement . Aortic knob is again calcified .
    OUTPUT:
    
No acute intrathoracic process . Given the patient 's history , a chest CT to better delineate nodular opacities and interstitial abnormalities as seen on prior CT should be considered .