Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are essentially clear noting minimal residual bibasilar opacities , potentially due to atelectasis , somewhat better seen on the frontal exam . There is no effusion or pulmonary vascular congestion . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormality is identified . Surgical clips in the right upper quadrant suggest prior cholecystectomy .
    OUTPUT:
    
No acute cardiopulmonary process .