Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Normal heart , mediastinum , hila , and pleural surfaces . A vague opacity in the left lower lung is new and likely to be atelectasis , however a small pneumonia can not be excluded . Multiple right healed rib fractures were present on the CT from ___ .
    OUTPUT:
    
New vague opacity in the left lower lung is statistically likely atelectasis , however a small pneumonia can not be excluded .