Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Stable widening of the cardiomediastinal contour relates to a combination of cardiomegaly and thoracic aortic aneurysm . Small right apical pneumothorax is unchanged . The right chest tube is unchanged in position . Bibasilar atelectasis , especially at the right base has improved since the prior study . The right internal jugular approach central venous catheter terminates in the lower SVC .
    OUTPUT:
    
Stable small right apical pneumothorax . Improved right basal atelectasis .