Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are low in volume which gives an appearance of bronchovascular crowding . Despite this , an increase in pulmonary markings could reflect mild pulmonary edema . Linear opacities in the left lower lobe may reflect linear atelectasis without definite findings of pneumonia . No pleural effusion or pneumothorax is identified . Heart size is top normal . Marked upper mediastinal widening is due to chronic adenopathy and thymic enlargement , documented on Chest CTA ___ .
    OUTPUT:
    
Low lung volumes limiting assessment with perhaps mild pulmonary edema and linear left lower lobe atelectasis . If continued clinical concern , consider repeat radiographs with a larger inspiration .