Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrate a dilated or tortuous abdominal aorta . Heart size is within normal limits . Calcifications about the aortic arch are noted . Linear opacity at the left lung base most likely reflects atelectasis . Increased interstitial markings , right greater than left , raises the possibility of chronic interstitial process . No focal opacity convincing for pneumonia is detected . There is however an 8 mm nodular opacity in the right mid lung . There is no pleural effusion or pneumothorax . Biapical scarring is symmetric . No acute osseous abnormality is identified .
    OUTPUT:
    
Left basilar atelectasis . No focal opacity convincing for pneumonia . Increased interstitial markings raising possibility of chronic underlying interstitial process . 8 mm nodular opacity in the right midlung .