Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size remains mildly enlarged . Aortic CoreValve device is again noted . Mediastinal and hilar contours are unchanged . Pulmonary vasculature is not engorged , but there is crowding of the bronchovascular structures . Patchy bibasilar opacities likely reflect areas of atelectasis . Known pulmonary nodules seen on prior CT are not well assessed on the current radiograph .
    OUTPUT:
    
Low lung volumes with mild bibasilar atelectasis .