Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Increased opacity with faint air bronchograms in the left lower lobe which is new since ___ is concerning for pneumonia . Left upper lung and right lung are clear . Blunted left lateral and posterior costophrenic sulcus is longstanding and stable , likely chronic pleural scarring . There is evidence of multiple bilateral old healed rib fractures . Heart size is normal , mediastinal and hilar contours are unremarkable .
    OUTPUT:
    
Lower lung opacity with faint air bronchograms new since ___ is concerning for pneumonia .