Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of chest . The lungs are clear aside from very minimal dependent atelectasis . There is no pneumonia , pleural effusion , pneumothorax or pulmonary edema . Heart size is normal . Aorta is slightly tortuous . Degenerative changes of the thoracic spine are noted .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .