Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged including a large aneurysm arising from the aortic arch as well as cardiomegaly . A moderate - sized hiatal hernia is again present although not as well depicted . There is no definite pleural effusion , although small pleural effusions would be difficult to exclude . This study shows hazy opacification of the right mid-to - lower lung . Opacities are most extensive in the right lower lung .
    OUTPUT:
    
Mild increased interstitial abnormality in the right lung . Differential considerations include pneumonia or an asymmetric form of pulmonary edema . Persistent moderate hiatal hernia .