Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . The aorta remains mildly tortuous with atherosclerotic calcifications noted at the knob . Mediastinal and hilar contours are otherwise unremarkable , and the pulmonary vasculature is normal . There is minimal streaky atelectasis in the lung bases without focal consolidation . No pleural effusion or pneumothorax is present . Moderate degenerative changes are again seen in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .