Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single portable frontal view of the chest is performed . An endotracheal tube is present , with the balloon inflated and the tip 4 cm above the carina . A feeding tube is present with the port terminating in the esophagus . The lungs volumes are low . Accounting for this , the mediastinal contours are normal . The cardiac silhouette is mildly enlarged . Opacification of the retrocardiac space is thought to reflect atelectasis . There is no pleural effusion or pneumothorax . There are no acute osseous abnormalities .
    OUTPUT:
    
1 . Satisfactorily positioned endotracheal tube . 2 . Retrocardiac opacification , likely atelectasis . 3 . Advancement of the orogastric tube by 5 cm is recommended for better positioning .