Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The hemidiaphragms are mildly elevated and the lung volumes are low , resulting and artificial magnification of the heart and mediastinum , as well as left lung base subsegmental atelectasis . There is no pneumothorax or pleural effusion . Regional bones and soft tissues are unremarkable .
    OUTPUT:
    
Hypoinflated lungs with left lung base subsegmental atelectasis .