Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Endotracheal tube is no longer visualized . There is some blunting of the left lateral costophrenic angle potentially due to pleural thickening or atelectasis / scar . There is no blunting of the posterior costophrenic angle suggests layering effusion . The lungs are otherwise clear and there is no pulmonary vascular congestion . Cardiomediastinal silhouette is within normal limits . There is tortuosity of the descending thoracic aorta . No acute osseous abnormality is detected .
    OUTPUT:
    
No definite acute cardiopulmonary process .