Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Subtle lower lung opacities are most compatible with atelectasis as seen on same - day CT abdomen pelvis . No large effusion or pneumothorax . The cardiomediastinal silhouette is normal . Imaged osseous structures are intact . An old left mid shaft clavicle deformity is noted . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
Basilar atelectasis , otherwise unremarkable .