Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . Coronary artery stent is noted . There is no overt pulmonary edema . Rounded retrocardiac opacity medially may relate to a hiatal hernia .
    OUTPUT:
    
No focal consolidation to suggest pneumonia . Rounded opacity projecting over the left cardiophrenic angle may relate to a hiatal hernia .