Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , causing accentuation of the pulmonary vasculature and exaggeration of the heart size . There are multiple left rib fractures including displaced segmental fractures of the posterior ___ and ___ ribs as well as a displaced fracture through the Substantial retrocardiac heterogeneous opacity in the left lower lobe is atelectasis and / or contusion . Heart size is top normal . The mediastinal contours are normal . There may be a small left pleural effusion . No right pleural effusion . No definite pneumothorax . posterior 8th rib .
    OUTPUT:
    
1 . Multiple left rib fractures , detailed above . 2 . No definite pneumothorax . 3 . Substantial left basal consolidation , atelectasis and / or contusion . 4 . Possible small left pleural effusion . Findings were discussed with Dr . ___ by Dr . ___ at 8 : 11 a .m . on ___ .