Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is the left - sided pigtail catheter . The catheter configuration is slightly different compared with the prior study , though overall positioning is similar . No pneumothorax is detected . Again seen is retrocardiac density consistent with left lower lobe collapse and / or consolidation . No gross left effusion . The cardiomediastinal silhouette is within normal limits , allowing for minimal surrounding atelectasis . The left paratracheal soft tissues and aortic knob are within normal limits on the current study . The right lung is grossly clear , without CHF . Focal infiltrate , pleural effusion , or pneumothorax . Left mid clavicular fracture again noted . Alignment is grossly anatomic on this view .
    OUTPUT:
    
1 . Left pigtail catheter overall similar position , but slightly different in configuration . No pneumothorax or gross left effusion detected . 2 . Left lower lobe collapse and / or consolidation again noted , similar to the prior study . 3 . Left mid clavicular fracture again noted .