Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest are compared to previous exam from ___ . Lower lung volumes seen on the current exam . Bibasilar opacities are seen suggestive of atelectasis . The lungs are otherwise clear . Cardiomediastinal silhouette is grossly unchanged given differences in positioning and technique . Osseous and soft tissue structures are unremarkable .
    OUTPUT:
    
No definite acute cardiopulmonary process .