Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Comparison is made to prior study from ___ . Heart size is normal . Lungs are clear . There are no pneumothoraces , focal consolidation , or pleural effusions . Bony structures are intact . There are some mild degenerative changes of the thoracic and upper lumbar spine .
    OUTPUT:
    
No signs for acute cardiopulmonary process .