Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Again seen , there are bibasilar opacities which may be due to chronic atelectasis / scarring , similar in appearance compared to prior . No definite focal consolidation is seen . No large pleural effusion or pneumothorax is seen . The cardiac silhouette is mild - to - moderately enlarged . The aorta is calcified and tortuous .
    OUTPUT:
    
Bibasilar opacities , most likely representing scarring / atelectasis .