Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Two portable AP chest radiographs were obtained . There are diffuse reticular interstitial opacities at the peripheral bases of both lungs as well as more sheet - like atelectasis of the right lower lobe . The costophrenic angles are excluded from the film , but there is no large pleural effusion . Lung volumes are low . The heart is enlarged . The aortic arch is enlarged and calcified .
    OUTPUT:
    
1 . Enlarged aortic arch and extensively calcified aortic arch , worrisome for aneurysmal dilatation . If warranted by clinical situation , further evaluation could be performed with Chest CTA . 2 . Reticular pulmonary opacities , most compatible with chronic lung disease . 3 . Bibasilar atelectasis .