Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low accentuating the cardiac silhouette and pulmonary vasculature . Prominent retrocardiac density is unchanged , possibly representing a large hiatal hernia . Severe cardiomegaly is unchanged . There is mild unfolding of the thoracic aorta . Hilar contours are unremarkable . Lungs are clear . There is no large effusion or pneumothorax . Multiple right - sided rib deformities are unchanged .
    OUTPUT:
    
1 . No evidence of pneumonia or interstitial pulmonary edema . 2 . Unchanged right - sided rib deformities compatible with age indeterminate fracture . 3 . Possible large hiatal hernia .