Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval placement of a left pleural pigtail catheter with interval decrease in size of the left pleural effusion which now occupies approximately half of the area of the left hemithorax . There is interval resolution of rightward mediastinal shift . Small right pleural effusion persists . Subtle opacity of the right lower lung field persists . Aortic knob calcification is again noted . Evaluation of heart size is limited in the setting of overlying pleural effusion . There is decreased downward displacement of the gastric bubble .
    OUTPUT:
    
Interval placement of a left pleural catheter with decreased size of left pleural effusion , which is now moderate to large , with resolved rightward mediastinal shift and decreased downward displacement of the gastric bubble .