Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest were provided . Lung volumes are low . Bibasilar streaky opacities are most compatible with atelectasis . Blunting of the CP angle is noted posteriorly which could indicate a small pleural effusion on the left . Cardiomediastinal silhouette appears grossly unremarkable . Bony structures are intact .
    OUTPUT:
    
Lower lung atelectasis with possible small left effusion .