Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs demonstrate opacification of the left lower lobe with air bronchograms . The patient has been entubated . There is also bibasilar atelectasis . The heart size is mildly enlarged . Prominence of the azygos vein and pulmonary vasculature is unchanged from ___ .
    OUTPUT:
    
Likely left lower lobe pneumonia .