Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Comparison is made to prior study from ___ . Heart size is upper limits of normal but unchanged . The aorta is slightly tortuous . Lungs are grossly clear without focal consolidation , pleural effusion or signs for acute pulmonary edema . Bony structures appear intact . There are some degenerative changes of the thoracic spine .
    OUTPUT:
    
No signs for acute cardiopulmonary process .