Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Patient has undergone interval left thoracentesis with decreased left pleural effusion and mild residual atelectasis the left lung base . No pneumothorax . Otherwise no change .
    OUTPUT:
    
Decreased left pleural effusion with residual left basal atelectasis . No pneumothorax .