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 ___ . Low lung volumes are seen on the current exam . Left basilar opacity is identified , potentially in part due to atelectasis . Elsewhere , the lungs are clear and there is no effusion or pneumothorax . Cardiomediastinal silhouette is within normal limits . Osseous and soft tissue structures are unremarkable .
    OUTPUT:
    
Left basilar opacity , potentially due to atelectasis given low lung volumes ; however , infection is not excluded . Clinical correlation suggested .