Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs demonstrate mild cardiomegaly . The mediastinal contours within normal limits . The lungs are fairly well - aerated , without focal consolidation , pleural effusion , or pneumothorax . Minimal bibasilar opacities likely reflect atelectasis . There is a hiatal hernia .
    OUTPUT:
    
No acute cardiopulmonary process .