Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior study , no definite change is detected . Again seen are sternotomy wires and the sternotomy closure construct . The cardiomediastinal silhouette is unchanged . No overt CHF . Bibasilar atelectasis . Minimal blunting at the right costophrenic angle , without gross effusion . The torso CT from ___ describes nondisplaced fractures of the right ___-11th ribs . These are not readily visible on the current radiograph . Allowing for lordotic positioning , no pneumothorax is detected . There is only trace right base atelectasis .
    OUTPUT:
    
Known right lower chest rib fractures not well demonstrated radiographically . No pneumothorax detected . Bibasilar atelectasis , minimal on the right , with possible trace right pleural fluid .