Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right infrahilar and lower lobe streaky opacities with air bronchograms are most likely atelectasis , with associated slight elevation of the right hemidiaphragm , as also noted on the prior chest radiograph and CT . Streaky opacities at the left lung base are less prominent but also likely represent atelectasis , also noted previously . Large retrocardiac opacity with scattered focal areas of rounded lucencies are most consistent with the known large hiatal hernia containing loops of bowel and mesenteric fat , best appreciated on recent CT , and perhaps slightly increased from the prior exam . No definite focal consolidation to suggest a focal pneumonia . No edema . The heart size is difficult to accurately assess on this AP view , also in the setting of large hiatal hernia . Aortic knob calcifications are moderate , overall unchanged . No pneumothorax . No evidence of acute osseous abnormality on these non-dedicated images . Degenerative changes in both shoulders are noted .
    OUTPUT:
    
1 . Large hiatal hernia 2 . Bibasilar atelectasis , worse on the right , although right infrahilar aspiration or concurrent pneumonia in the setting of the known large hiatal hernia can not be definitely excluded without a lateral view . 3 . No edema .