Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right subclavian catheter terminates in lower SVC . Nasogastric tube terminates below the diaphragm . Tracheostomy terminates below the level of the thoracic inlet . Mild cardiomegaly and mediastinal contours are stable . Moderate left pleural effusion is substantially improved since the radiograph performed at 04 :41 , with mild bibasilar atelectasis . No pneumothorax .
    OUTPUT:
    
Significant improvement in moderate left pleural effusion and left lung aeration after thoracentesis . No pneumothorax . Mild bibasilar atelectasis .