Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , with the left lung less well expanded than the right , likely due to splinting . Rib fractures are better appreciated on the patient 's recent CT . The cardiac silhouette is top normal in size , the mediastinal contours are normal . There is no pneumothorax or large pleural effusion .
    OUTPUT:
    
Hypo-expansion of the left lung , likely from splinting .