Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Minimally displaced right - sided rib fractures appear similar compared to prior trauma radiographs from ___ and are better characterized on followup CT torso from the same day . Known left - sided rib fractures are also better characterized on prior CT . There is no evidence of pneumothorax . Linear opacities in the lung bases correspond with known subsegmental atelectasis including increased left basilar opacity since the prior radiographs . The left upper lung appears better aerated , however . New mild blunting of the bilateral costophrenic angles suggestive of developing small bilateral pleural effusions . A known manubrium fracture is not well characterized on this single frontal view . Mediastinal contours appear similar compared to recent prior suggesting probable stability of the known retrosternal hematoma . Hilar and cardiac contours are within normal limits . Cervical spinal hardware is incompletely imaged . There has been interval placement of probable epidural catheter in the mid thoracic spine .
    OUTPUT:
    
1 . Unchanged multiple rib fractures , better characterized on prior CT . No pneumothorax . 2 . Stable mediastinal contours , though incompletely evaluated manubrial fracture and retrosternal hematoma . 3 . New left basilar opacity suggesting atelectasis . 4 . Suspected very small developing pleural effusions .