Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are well inflated . A left - sided pacing device with dual leads follow the expected course to the right atrium and ventricle , respectively . No focal consolidation or pneumothorax . Blunting of the left costophrenic angle may be due to a small pleural effusion or chronic pleural thickening . No large effusion on the right . There is no central vascular congestion or pulmonary edema . Diffuse interstitial opacification extending to the periphery bilaterally is unchanged since prior study and likely reflects a chronic interstitial process . There is stable mild parenchymal scarring at the right lung base . Unchanged tortuosity of the thoracic aorta is re - demonstrated with atherosclerotic calcifications . Otherwise , mediastinal and hilar contours are unchanged . Heart size normal .
    OUTPUT:
    
1 . No pulmonary edema . 2 . Possible trace left pleural effusion versus pleural thickening . No large effusion on the right . 3 . Similar mild diffuse interstitial opacities , suggestive of a chronic interstitial process .