Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a cardiac silhouette which is top - normal in size and well - aerated lungs which are clear . There is no focal consolidation , pleural effusion , or pneumothorax . Again seen is a large hiatal hernia , increased in size . Gaseous distention of the esophagus is noted .
    OUTPUT:
    
No acute cardiopulmonary process .