Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . This accentuates the size of the cardiac silhouette which is borderline enlarged with a left ventricular predominance . The aortic knob is calcified . Mediastinal and hilar contours are unremarkable . There is crowding of the bronchovascular structures without overt pulmonary edema . Patchy opacities in the lung bases likely reflect atelectasis . No pleural effusion , pneumothorax , or focal consolidation is present . Moderate multilevel degenerative changes with anterior osteophytic spurring are demonstrated in the thoracic spine .
    OUTPUT:
    
Low lung volumes with patchy bibasilar airspace opacities , likely atelectasis .