Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The inspiratory lung volumes are significantly decreased , which accentuates the appearance of the cardiomediastinal silhouette . The right hemidiaphragm is well visualized , and the right costophrenic angle is clear . The left hemidiaphragm is obscured , which likely reflects a combination of pleural fluid and associated atelectasis . No pneumothorax is detected . The cardiomediastinal silhouette is prominent , related in part to lung under - inflation . Scant calcification of the aortic knob is noted . The trachea is deviated to the right by the aortic knob . No displaced rib fractures are detected ; however , evaluation is limited due to underpenetration .
    OUTPUT:
    
1 . Small left pleural effusion and associated atelectasis in the setting of low lung volumes . 2 . No displaced rib fractures ; however , a dedicated rib series should be obtained if there is clinical concern .