Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral chest radiograph demonstrates elevation of the right hemidiaphragm . Subsequent atelectasis at the bilateral bases is mild . Cardiomediastinal and hilar contours are stable relative to prior examination . There is no focal opacity identified . There is no pneumothorax , large pleural effusion , or evidence of pulmonary edema . Degenerative changes are noted at the shoulders bilaterally . Old right lateral rib fractures are also noted .
    OUTPUT:
    
No evidence of pneumonia .