Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are streaky bibasilar opacities likely due to atelectasis in the setting of low lung volumes . There is no other region of consolidation , effusion , or edema . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities identified . Surgical clips in the right upper quadrant suggest prior cholecystectomy .
    OUTPUT:
    
Bibasilar opacities which are most likely atelectasis . Lungs are otherwise clear without acute cardiopulmonary process .