Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No significant interval change . The lungs are well - expanded and clear . No focal consolidation , pleural effusion , pneumothorax , or pulmonary edema . The heart is normal in size . The mediastinum is not widened . Hila are unremarkable . Calcifications of the aortic knob are unchanged . Mild degenerative changes of the visualized thoracic spine anterior osteophytes are unchanged .
    OUTPUT:
    
No acute intrathoracic process . No pneumonia .