Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The aortic arch is calcified . The mediastinal and hilar contours show mild upper mediastinal widening , probably normal , although it is hard to exclude lymphadenopathy . At the lung bases there is somewhat coarse reticulation suggestive of an underlying interstitial abnormality . The lungs appear otherwise clear .
    OUTPUT:
    
Findings suggestive of interstitial abnormality at the lung bases . Mild right paramediastinal stripe widening , but probably an artifact of technique . Suspicion for interstital abnormality at the lung bases . Evaluation with chest CT may be helpful to characterize findings in follow - up to assess for lymphadenopathy or interstitial disease .