Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are clear of focal consolidation , pleural effusions or pneumothoraces . Previous radiolucency along the left superior mediastinum is not seen on this exam . There is no pneumomediastinum . The cardiac and mediastinal silhouette is unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process . Previous left superior mediastinum linear lucency is not seen on this exam .