Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The inspiratory lung volumes are decreased . There is mild increased opacification of the left lung base , which is most compatible with atelectasis . No focal airspace opacity concerning for pneumonia is detected . There is no significant pleural effusion or pneumothorax . The pulmonary vasculature is not engorged . The cardiac silhouette is mildly enlarged but stable . The mediastinal contours are unchanged from ___ with tortuosity of the thoracic aorta . The hilar contours are within normal limits . The trachea is midline . There is no free air beneath the right hemidiaphragm .
    OUTPUT:
    
No acute cardiopulmonary process .