Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were compared to previous exam from ___ . Again low lung volumes are seen as well as elevation of the left hemidiaphragm . Linear opacity at the left lung base is suggestive of atelectasis . The lungs are otherwise clear . There is no effusion or pneumothorax . Cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
No acute cardiopulmonary process .