Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are grossly clear without consolidation or edema . Cardiac silhouette is within normal limits . Prominence of the mediastinum is likely in part projectional and due to semi supine film . Tortuosity of the descending thoracic aorta is noted . No acute osseous abnormalities .
    OUTPUT:
    
No definite acute cardiopulmonary process .