Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are obtained . Left basilar atelectasis . No large effusion . No definite sign of pneumonia . Cardiomediastinal silhouette is stable . Bony structures intact . Old healed left mid clavicle shaft fracture noted . No free air below the right hemidiaphragm .
    OUTPUT:
    
Left basilar atelectasis .