Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single frontal view of the chest was obtained portably . Low lung volumes result in bronchovascular crowding . Bibasilar opacities are seen , which may represent a combination of pleural fluid and atelectasis or hemorrhage in the setting of trauma . The patient 's known rib fractures are not well seen on this study . Per the ED notes , the patient has an outside CT scan , which has not yet been uploaded for reference . Cardiac silhouette is obscured by the bilateral opacities .
    OUTPUT:
    
Bibasilar opacities may represent a combination of pleural fluid and consolidation or hemorrhage in the setting of trauma .