Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes bilaterally with clear lungs . No pleural effusion or pneumothorax . Heart size is top normal with tortuous aorta and normal mediastinal contour and hila . Moderate degenerative change of thoracic spine without additional bony abnormality .
    OUTPUT:
    
Low lung volumes bilaterally . No pneumonia .