Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest film ___ at 21 :33 is submitted .
    OUTPUT:
    
Interval placement of a left pleural pigtail catheter in the costophrenic angle with decrease in the size of the pleural effusion and re-expansion of the left lung . There continue to be streaky opacities at the left base likely reflecting residual atelectasis . The right lung is grossly clear , although there is some prominence of the interstitium of uncertain significance . No evidence of pulmonary edema . Overall cardiac and mediastinal contours are stable . No pneumothorax . Nasogastric tube is seen coursing below the diaphragm with the tip projecting over the stomach .