Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Tracheostomy tube in noted at the superior mediastinum . The lung volumes are low and there is right base atelectasis , but the lungs are otherwise clear . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .