Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post coronary artery bypass graft surgery . The heart is moderately enlarged . The mediastinal and hilar contours appear unchanged . Central pulmonary vascularity is prominent , with upper zone redistribution and indistinct appearance suggesting mild vascular congestion . In addition , there is a widespread new focal opacity projecting over the right lower lung , obscuring the right heart border and likely within the right middle lobe . There are also streaky left infrahilar opacities with air bronchograms . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Basilar opacities , right greater than left , worrisome for pneumonia , noting that these are fairly focal and confluent . Background increased pulmonary vascular congestion is also suggested by diffuse vascular prominence and indistinctness , however .