Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low with probable right basilar atelectasis . The lungs are otherwise clear without a consolidation or edema . There is no pleural effusion or pneumothorax . Atherosclerotic calcifications are noted along an unchanged tortuous aorta . The mediastinal contours are otherwise normal . The heart is mildly enlarged , particularly the left atrium , and unchanged . Moderate degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary process ; specifically , no evidence of pneumonia .