Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . Bilateral diffuse interstitial thickenings are compatible with pulmonary edema . There is no focal opacity . The heart is enlarged , mostly from left atrial and left ventricle contribution with splaying of the carina , left atrial appemndage prominence and verticalization of the long cardiac axis . There is a large hiatal hernia and a tortuous aorta which account for a rounded retrocardiac opacity in the lateral view . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
1 . Bilateral diffuse interstitial thickening may be due to interstitial pulmonary edema in the setting of enlargement of the left cardiac chambers or may be secondary to pulmonary emphysema . 2 . Large hiatal hernia .