Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The 8 mm focal opacity projecting over the left first rib corresponds to a bone island seen on most recent chest CT from ___ . Left basilar atelectasis is noted . Cardiac size is normal . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
8 mm focal of opacity corresponds to a bone island within the left first rib . Left basilar atelectasis .