Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are relatively low . There is no large effusion or visualized pneumothorax based on this supine film . Prominence of the cardiac silhouette is likely accentuated by AP supine technique with possible underlying mild cardiomegaly . Left lateral rib fractures are better seen on concurrent torso CT .
    OUTPUT:
    
Left lateral rib fractures as seen on CT . No definite pneumothorax or effusion .