Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Linear left basilar opacity is most likely atelectasis . The lungs are otherwise clear without consolidation or vascular congestion . Pulmonary nodules seen on prior chest x-ray are not as conspicuous on the current exam The cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
Left basilar atelectasis . No acute cardiopulmonary process .