Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Small left pleural effusion is seen . Linear opacity in the left lower lobe is likely due to chronic atelectasis or scarring . Bilateral interstitial opacities and prominent pulmonary vasculature is non specific and not likely from pulmonary edema . The heart is enlarged , unchanged from prior . The mediastinum and hilar contours are unchanged . There is evidence of vertebroplasty . Surgical clips are noted in the abdomen . Left - sided dual lead pacemaker is again seen , with leads in unchanged position .
    OUTPUT:
    
1 . Small left pleural effusion . 2 . No pneumonia or large intrathoracic mass .