Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The endotracheal tube ends approximately 3 .5 cm above the carina . The cardiomediastinal and hilar contours are stable , with mild cardiomegaly . Again seen is stable dense opacity in the retrocardiac left lung base . Also seen are streaky opacities and mild volume loss in the right lung base indicative of atelectasis . There is mild improvement in the pulmonary edema . A small left pleural effusion is likely present . There is no pneumothorax .
    OUTPUT:
    
Endotracheal tube is now optimally positioned with the tip 3 .5 cm above the carina .