Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . The lungs appear clear without focal consolidation , effusion or pneumothorax . A retrocardiac density is compatible with a hiatal hernia with large known esophageal varices . There is no pneumothorax or pleural effusion . Heart is normal in size . Mediastinal contour is unremarkable . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
No acute intrathoracic process .