Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been regression of the pleural density seen in the left lower lung after decortication . There has been an increase in the left lung ventilation with corresponding decrease in amount of atelectasis seen . There has been interval decrease in the left pleural effusion . The right lung is unremarkable with no focal consolidation . There is no detectable pneumothorax . Cardiomediastinal silhouette is stable and within normal limits .
    OUTPUT:
    
Regression of pleural density seen in left lung .