Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The mediastinal and hilar contours are are remarkable for a tortuous thoracic aorta . Lungs are hyperexpanded and grossly clear . It s left PICC remains in standard position . No acute skeletal findings . .
    OUTPUT:
    
Hyperexpanded lungs in keeping with history of asthma . No evidence of pneumonia . .