Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . When compared to prior , there has been no significant interval change . The lungs are grossly clear noting some increased opacity at the lung bases most suggestive of atelectasis . There is no large effusion or pneumothorax . The cardiomediastinal silhouette is stable in configuration . No displaced fractures identified .
    OUTPUT:
    
No definite acute cardiopulmonary process .