Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient has been extubated . Left lung increased opacification is accompanied with shift of the mediastinum . NG tube is in adequate position and left subclavian line ends at the junction of the brachiocephalic vein and superior vena cava . There is no pneumothorax .
    OUTPUT:
    
1 . Patient has been extubated . 2 . New left lung opacification and mediastinal shift is probably explained by partial lung collapse due to mucus plugging .