Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided pacemaker device with leads terminating in the right atrium and right ventricle is noted . Heart size is normal . Mediastinal and hilar contours are unremarkable . Apical predominant emphysema is noted . There is no pulmonary edema . Linear scarring within the left upper lobe is seen . Left lower lobe ill - defined opacity is concerning for pneumonia . No pleural effusion or pneumothorax is seen . Scarring within the apices is demonstrated . Several clips are demonstrated within the posterior mediastinum superiorly . Additionally there appears to have been prior resection of the right ___ posterior rib .
    OUTPUT:
    
Left lower lobe ill - defined opacity concerning for pneumonia . Followup radiographs after treatment are recommended to ensure resolution of this finding .