Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior exam , the lung volumes are lower . There are increased bibasilar opacities , which likely represent atelectases . A pneumonia can not be excluded . There is no pulmonary edema . There is no definite pleural effusion . The small apical pneumothorax identified on the prior exam is not visualized on today 's exam . The mediastinal contours are normal . The cardiac size is minimally enlarged , and unchanged from the prior exam .
    OUTPUT:
    
1 . Increasing bibasilar opacities , likely due to atelectasis . A pneumonia can not be completely excluded . 2 . Resolution of the small right apical pneumothorax .