Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild bibasilar atelectasis is seen . 1 .1 cm ovoid calcification projecting over the left lung base is stable , as is an ovoid calcifications measuring 1 cm projecting over the right peritracheal region . No large pleural effusion or pneumothorax is seen . Left apical pleural thickening mild is again noted . The cardiac and mediastinal silhouettes are stable . Subtle old rib deformities are again noted .
    OUTPUT:
    
Mild bibasilar atelectasis . No significant interval change .