Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to ___ at 11 :56 , no gross change is detected . Again seen is left - sided catheter . There is a possible tiny knee left apical pneumothorax . Patchy opacity at the left base is again noted , possibly slightly improved . Minimal blunting of left costophrenic angle could be due to either atelectasis or small pleural fusion . Minimal patchy atelectasis in the right cardiophrenic region is again noted , very slightly more pronounced . No gross right effusion . No CHF . Cardiomediastinal silhouette is unchanged . Left mid clavicular fracture again noted , unchanged in alignment .
    OUTPUT:
    
1 . Equivocal tiny left apical pneumothorax . 2 . Overall appearance is similar to the previous film . Slight interval improvement in retrocardiac density . Possible minimal increase in the patchy right cardiophrenic density . 3 . Left mid clavicular fracture again noted .