Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left vagal nerve stimulator is in unchanged position . Low lung volumes accentuate the cardiomediastinal contours and result in crowding of bronchovascular structures . With this limitation in mind , there is likely mild pulmonary vascular congestion but no overt evidence of pulmonary edema or pneumonia . There is no pneumothorax , fracture or dislocation . Limited assessment of the abdomen is unremarkable . Elevation of left hemidiaphragm is likely due to adjacent gastric distension .
    OUTPUT:
    
No evidence of pneumonia . If clinical suspicion persists , repeat radiograph with improved inspiratory level may be helpful for more complete assessment .