Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Evaluation is somewhat limited by underlying trauma board . A right IJ central venous catheter terminates in the upper to mid SVC . Markedly enlarged mediastinum is due to calcified lymph nodes as seen on outside chest CT . The cardiac silhouette is within normal limits . Lung volumes are decreased and there is atelectasis at the left lung base . There is no large pleural effusion or pneumothorax . No acute osseous injury identified .
    OUTPUT:
    
Limited evaluation due to underlying trauma board , however no definite acute cardiopulmonary process . No acute osseous injury identified .