Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Linear left basilar opacity is likely atelectasis . Elsewhere , the lungs are clear without consolidation , effusion or edema . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities . Clips in the right upper quadrant suggest prior cholecystectomy .
    OUTPUT:
    
No definite acute cardiopulmonary process .