Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild atelectasis is seen in the lower lung bases with possible small residual scarring in the left lower lung . No pneumonia , pulmonary edema , or pneumothorax . The heart size is normal . The right PICC line tip terminates in the mid-SVC .
    OUTPUT:
    
1 . Mild bibasilar atelectasis with possible small residual scarring seen in the left lower lung . No pneumonia .