Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well inflated with bibasilar atelectasis . Subtle heterogeneous left lower lobe opacity noted . There is elevation of the left hemidiaphragm . No pleural effusion or pneumothorax . Heart size , mediastinal contour , and hila are unremarkable . Aortic arch calcifications are noted . Limited assessment of the osseous structures demonstrates bilateral humeral head replacement .
    OUTPUT:
    
1 . Subtle left lower lobe opacity is worrisome for pneumonia in the appropriate clinical setting . 2 . Elevation of left hemidiaphragm with left lower lobe atelectasis .