Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well inflated . There is increased interstitial thickening and bilateral hilar prominence . There is no pleural effusion or pneumothorax . Cardiomediastinal contour is unremarkable with the exception of aortic tortuosity . There is no cardiomegaly .
    OUTPUT:
    
Mild interstitial edema .