Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are mild bibasilar opacities , potentially due to atelectasis . There is no effusion or edema . The cardiomediastinal silhouette is within normal limits . Mild atherosclerotic calcifications noted at the aortic arch . No acute osseous abnormalities .
    OUTPUT:
    
No definite acute cardiopulmonary process . Mild bibasilar opacities are most likely atelectasis .