Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Low lung volumes result in bronchovascular crowding . There is mild bibasilar atelectasis . No focal consolidation , pleural effusion or pneumothorax . Enlargement of the cardiac and mediastinal silhouettes is likely due to mediastinal lipomatosis seen on the prior CT , accentuated by low lung volumes . Pulmonary vasculature is normal . No displaced rib fracture is seen . There is no free air under the diaphragm .
    OUTPUT:
    
No pneumonia , edema , or effusion .