Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The frontal and lateral views of the chest were obtained . Minimal mid lung linear atelectasis / scarring is seen . There is no focal consolidation , no pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are stable and unremarkable . Retrocardiac air - fluid level is again seen , consistent with patient 's known hiatal hernia .
    OUTPUT:
    
No acute cardiopulmonary process .