Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right basilar opacity may be due to atelectasis noting low lung volumes , not significantly changed from prior . Blunting of left costophrenic angle suggests small effusion as on prior . The cardiomediastinal silhouette is stable . No acute osseous abnormalities .
    OUTPUT:
    
No significant interval change . Small left effusion . Right basilar opacity potentially atelectasis noting that aspiration can not be excluded .