Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Slightly decreased lung volumes . Cardiomediastinal shadow is normal . No hilar adenopathy . No pulmonary edema . No suspicious pulmonary nodules or masses . No airspace consolidation . No pleural effusions . Mild spondylotic changes of the thoracic spine .
    OUTPUT:
    
No pneumonia . No cardiac failure / pulmonary edema .