Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Retrocardiac air - fluid level is likely due to a hiatal hernia , with adjacent atelectasis . No definite focal consolidation is seen . There is no pleural effusion or pneumothorax . The cardiac silhouette is top normal . The aorta is tortuous . The patient is rotated somewhat to the left . Degenerative changes are seen along the spine .
    OUTPUT:
    
Hiatal hernia . Otherwise , no acute cardiopulmonary process seen .