Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is bibasilar linear atelectasis . The lungs are otherwise clear . ELEVATION OF THE RIGHT LUNG BASE COULD BE DUE TO DISPLACEMENT OF THE DIAPHRAGM , PERHAPS DUE TO SUBPHRENIC PATHOLOGY IN THE RIGHT UPPER ABDOMINAL QUADRANT , PARTICULARLY SUBPHRENIC ABSCESS OR ABNORMALITY IN THE LIVER . IT COULD ALSO BE DUE TO SUBPULMONIC RIGHT PLEURAL EFFUSION , AND IS ASSOCIATED WITH ATELECTASIS AT THE BASE OF THE RIGHT LUNG . Heart size is normal . There is no pneumothorax . There is no pleural effusion . Pulmonary vascularity is normal .
    OUTPUT:
    
No definitive evidence of pneumonia . SEE DISCUSSION ABOVE FOR POSSIBLE ABNORMALITIES RESPONSIBLE FOR ELEVATION OF THE BASE OF THE AERATED RIGHT LUNG .