Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest . The lungs are clear of focal consolidation . Linear opacity in the retrosternal space most likely atelectasis . There is no large effusion . Enteric tube passes below the diaphragm with tip in the gastric body , in appropriate position . Cardiac silhouette is upper limits of normal . Descending thoracic aorta is tortuous . No acute osseous abnormalities detected .
    OUTPUT:
    
No acute cardiopulmonary process .