Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP chest radiograph is obtained in the supine position . Known rib fractures are better seen in the recent CT . Cardiomediastinal contours are unchanged . Lung volumes remain low . Left lung is clear except for mild atelectatic changes in the base . Diffuse haziness in the right lung likely represents layering of the hemothorax seen on prior CT scan . The pneumothorax seen at CT on ___ can not be appreciated .
    OUTPUT:
    
No significant changes compared to the prior study , with findings consistent with known right sided hemothorax , but no radiographically evident pneumothorax .