Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Large hiatal hernia with large air - fluid level is seen . The lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . There is no pulmonary edema . The cardiac silhouette is difficult to accurately assess due to the large hiatal hernia . Mediastinal contours are unremarkable . Aortic knob is calcified .
    OUTPUT:
    
Large hiatal hernia . Clear lungs . No pulmonary edema .