Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is an opacity in the right lung base involving the right middle lobe with associated right lung volume loss and elevation of the right hemidiaphragm , consistent with atelectasis although can not completely exclude a component of pneumonia or aspiration in the appropriate clinical setting . The previously seen right upper lobe rounded opacity has resolved from prior exam . Trace pleural effusions may be present . There is no pneumothorax . The cardiomediastinal silhouette is enlarged , similar prior exam .
    OUTPUT:
    
1 . Opacity in the right lung base with associated right lung volume loss , consistent with atelectasis although can not completely exclude a component of pneumonia or aspiration in the right clinical setting . 2 . Possible trace bilateral pleural effusions .