Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable supine frontal chest radiograph demonstrates endotracheal tube 1 .9 cm above the level of the carina in appropriate position . Limited evaluation due to patient rotation . The lungs are hypoinflated with bilateral lower lobe atelectasis . Multiple posterior right rib deformities are similar in appearance to previous examination and in the absence of trauma are consistent with healed rib fractures . No pleural effusion or pneumothorax . Heart is incompletely evaluated due to patient positioning . Mediastinal contour and hila are unremarkable . Limited assessment of the upper abdomen is unremarkable .
    OUTPUT:
    
1 . Endotracheal tube in appropriate position . 2 . Chronic right rib deformity from multiple healed rib fractures . 3 . Bibasilar atelectasis .