Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild enlargement of the cardiac silhouette is unchanged . Atherosclerotic calcifications of the aortic knob are again present . Lung volumes are low with crowding of the bronchovascular structures . Diffuse increased interstitial opacities likely reflect chronic changes . Patchy opacity in the left lung base may reflect atelectasis but is nonspecific . No overt pulmonary edema or pneumothorax is present . There is no large pleural effusion . No acute osseous abnormality is visualized .
    OUTPUT:
    
Low lung volumes with chronic interstitial changes . Patchy left basilar opacity may reflect atelectasis , but pneumonia is not excluded in the correct setting