Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Endotracheal tube , enteric tube , mediastinal drains , Swan - Ganz catheter , and left IJ sheath are in standard position . Heart size is normal . Interstitial edema is mild , slightly improved . No significant pleural effusion .
    OUTPUT:
    
Mild interstitial edema , slightly improved . Stable support lines and tubes . No significant pneumothorax .