Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest demonstrate relatively low lung volumes with minimal bibasilar atelectasis . There is no pleural effusion , pulmonary edema , pneumothorax or focal opacification within the lungs . The cardiac size is mildly enlarged . Aortic knob calcifications are present as well as multilevel degenerative changes in the mid thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary process .