Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are normal . There is no pleural effusion or pneumothorax . The lungs are well expanded with no focal consolidations concerning for pneumonia . Mild linear atelectasis is present at the left lung base . A left chest wall vagal stimulator is seen with lead extending into the soft tissues of the left neck . Note is made of an old right clavicular fracture with nonunion of the distal fragment . Surgical clips are present overlying the right upper quadrant , and a catheter is seen overlying the mid abdomen , partially imaged .
    OUTPUT:
    
Mild left base atelectasis with no focal consolidation concerning for pneumonia .