Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are within normal limits . The aorta is unfolded . Lung volumes are low which accentuates bronchovascular markings . There are bibasilar opacities as well as a patchy opacity an the right upper lobe . There is no pleural effusion or pneumothorax identified .
    OUTPUT:
    
Focal right upper lobe opacity , which could potentially represent infectious pneumonia , aspiration , or atelectasis . Bibasilar opacities are suggestive of atelectasis based on appearance on concurrent CT abdomen / pelvis .