Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes with bronchovascular crowding at the bases bilaterally . No focal consolidations . Heart size is normal . The mediastinal and hilar contours are normal . The pulmonary vasculature is normal . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities . A percutaneous biliary catheter is seen projecting over the right upper abdomen .
    OUTPUT:
    
No evidence of pneumonia .