Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Heart size and cardiomediastinal contours are stable . Bibasilar linear opacities are similar to prior and compatible with atelectasis or scarring . No focal consolidation , pleural effusion , or pneumothorax .
    OUTPUT:
    
Bibasilar linear opacities are similar to prior and compatible with atelectasis or scarring .