Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were reviewed . The cardiomediastinal and hilar contours are stable . Again noted is an azygos fissure . There is no pleural effusion or pneumothorax . Low lung volumes result in bronchovascular crowding . Improvement in pulmonary edema is noted . Bibasilar opacities may represent atelectasis , as seen on the recent CT scan from ___ ; however , infection is not excluded . Prominent air - filled loops of colon are noted .
    OUTPUT:
    
Bibasilar opacities , likely atelectasis . Infection is not excluded .