Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since prior , there has been interval removal of a left PICC . There is otherwise no significant change in the appearance of the chest with persistent elevation of the right hemidiaphragm and bibasilar atelectasis . The cardiomediastinal contour is unchanged . Tortuosity of the thoracic aorta is also stable .
    OUTPUT:
    
No evidence of pneumonia .