Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest show elevation of the right hemidiaphragm with associated reticular opacities at the right lung base which likely represent atelectasis , but in the correct clinical context , pneumonia can not be excluded . Mild blunting of the right costophrenic angle may represent a trace right pleural effusion , pleural scarring , or atelectasis . No pneumothorax is present . The left lung is clear . The cardiac silhouette is normal in size . The mediastinal and hilar contours are within normal limits . The aortic knob is partially calcified with unfolding of the thoracic aorta .
    OUTPUT:
    
Right basilar atelectasis or , in the correct clinical context , developing pneumonia .