Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: When compared to prior , the left lung base opacity is more conspicuous , particularly on the frontal exam , and it was new from ___ . Elsewhere , the lungs are clear . There is a small right effusion with possible trace left effusion as well . Cardiac silhouette is enlarged but stable . Atherosclerotic calcification is again seen at the aortic arch .
    OUTPUT:
    
More conspicuous left mid lung to basilar opacity when compared to most recent exam , compatible with pneumonia in the proper clinical setting . Recommend repeat after treatment to document resolution .