Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lower lung volumes seen on the current exam . There is blunting of left lateral and posterior costophrenic angles suggestive of a small effusion . Linear bibasilar opacities are most suggestive of atelectasis . Left apical 6 mm nodule is unchanged dating back to ___ . The cardiomediastinal silhouette is unchanged though given lower lung volumes . No acute osseous abnormalities .
    OUTPUT:
    
Probable small left effusion and bibasilar atelectasis .