Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is at least mildly enlarged . The aorta is unfolded . There is crowding of the bronchovascular structures with possible mild pulmonary vascular congestion , but no overt pulmonary edema is present . Bibasilar airspace opacities likely reflect the patient 's known of fibrosing NSIP , as seen on the prior chest CT . Blunting of the left costophrenic angle could suggest a small left pleural effusion . No pneumothorax is identified . No acute osseous abnormalities are visualized .
    OUTPUT:
    
Low lung volumes with bibasilar airspace opacities likely reflective of the patient 's known fibrosing NSIP . Blunting of the left costophrenic angle suggests a small effusion . Superimposed process at the lung bases is difficult to exclude . Possible mild pulmonary vascular congestion .