Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heterogeneous opacity with air bronchograms in the left lower lobe . Cortical irregularity of lateral left sixth and seventh ribs may represent rib fractures . No pneumothorax or pleural effusion and right lung is clear .
    OUTPUT:
    
1 . Possible left rib fracture at lateral sixth and seventh ribs . If clinical concern may consider detailed rib views with focal findings marked . 2 . Left lower lobe atelectasis . Although unlikely this may represent pneumonia in the appropriate clinical setting . Attempt made to contact via telephone . Results emailed to Dr . ___ by Dr .___ on ___ .