Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . Right - sided pacer device is noted with single lead terminating in the right ventricle . Left axillary vascular stent is re - identified . Heart size remains moderately enlarged . Lung volumes are low . The mediastinal contours are unchanged with calcification of the thoracic aorta re - demonstrated . There is crowding of the bronchovascular structures , with mild pulmonary vascular congestion . Ill - defined nodular opacity within the right mid lung field is new and may reflect a focus of infection . Additionally bibasilar airspace opacities appear progressed compared to the previous exam and could reflect atelectasis but infection or aspiration are not excluded . Small left pleural effusion persists , with a component loculated laterally , and is perhaps slightly increased compared to the prior study , with the right pleural effusion appearing essentially resolved . There is no pneumothorax .
    OUTPUT:
    
1 . Low lung volumes with mild pulmonary vascular congestion . 2 . Bibasilar airspace opacities could reflect atelectasis but aspiration or infection are not excluded . 3 . Small left pleural effusion , perhaps minimally increased compared to the previous exam , with resolution of previously noted right pleural effusion . 4 . Ill defined nodular opacity in the right mid lung field is new , possibly an area of infection .