Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is focal opacity at the left lung base . Elsewhere , the lungs are clear . The cardiomediastinal silhouette is stable . Atherosclerotic calcifications noted at the aortic arch . No acute osseous abnormalities .
    OUTPUT:
    
Left lower lobe consolidation compatible with pneumonia in the proper clinical setting . Repeat after treatment is recommended to ensure resolution .