Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly low . There is no large focal consolidation , pleural effusion or pneumothorax . Bibasilar opacities likely represent atelectasis . Linear opacity in the right midlung is stable from prior radiographs and may represent atelectasis or scarring . Cardiomediastinal silhouette is unchanged . There are no overt signs of pulmonary edema .
    OUTPUT:
    
No significant change since the prior radiograph . Bibasilar atelectasis .