Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are compared to previous exam from ___ . The lungs are clear of focal opacity or large confluent consolidation . Minimal linear opacity seen at the left lung base on the frontal view , not visualized on the lateral , which could be due to atelectasis . The costophrenic angles are sharp . The cardiomediastinal silhouette is within normal limits . Hypertrophic change is seen in the spine .
    OUTPUT:
    
Minimal left basilar opacity on the frontal view , potentially due to atelectasis . Possibility of infection is not completely excluded . Clinical correlation recommended .