Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Focal region of consolidation is noted in the left mid lung was seen on multiple priors dating back to ___ . These appear slightly more conspicuous on the current exam likely secondary to overlying scapula . Elsewhere , the lungs are clear . The cardiomediastinal silhouette is stable . Atherosclerotic calcifications noted at the aortic arch . No displaced fractures identified .
    OUTPUT:
    
Persistent left mid lung opacity potentially atelectasis or scarring noting that superimposed infection is not entirely excluded .