Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low ; however , the lungs are clear without focal consolidation , pleural effusion or pneumothorax . The heart and mediastinal contours appear normal . A vascular stent in the region of the left axilla is unchanged in position . Elevation of the right hemidiaphragm is unchanged compared to multiple prior chest radiographs .
    OUTPUT:
    
No evidence of pneumonia .