Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The inspiratory lung volumes are appropriate . There is a new small right pleural effusion . There is no focal consolidation concerning for pneumonia or pneumothorax . The pulmonary vasculature is not engorged . The cardiomediastinal and hilar contours are within normal limits . No acute osseous abnormality is detected , specifically no displaced rib fracture .
    OUTPUT:
    
New small right pleural effusion . No focal consolidation concerning for pneumonia . Given the recent negative chest CTA and lack of leukocytosis , the etiology is unclear .