Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Linear opacities at the lung bases are most suggestive of atelectasis . Elsewhere the lungs are clear . There is no pneumothorax or large effusion . The cardiomediastinal silhouette is within normal limits noting tortuosity of the descending thoracic aorta . No displaced fractures are identified . Surgical clips seen in the right upper quadrant .
    OUTPUT:
    
No definite acute cardiopulmonary process .