Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is partial obscuration of the right hemidiaphragm which may be due to atelectasis versus infection . There may be a trace right pleural effusion . No large pleural effusion is seen . Cardiac silhouette is top - normal . The aorta is tortuous .
    OUTPUT:
    
Patchy right base opacity could be due to atelectasis or pneumonia .