Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is intubated . The endotracheal tube terminates 4 cm above the carina . A right subclavian central venous catheter terminates in the right atrium . An orogastric tube courses into the stomach ; it s tip not visualized . The lung volumes are low . The cardiac , mediastinal and hilar contours appear within normal limits . Patchy opacity at the left lung base suggests minor atelectasis . Otherwise , the lungs appear clear . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No evidence of acute process .