Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The gastric tube not visualized . A right central venous catheter tip projects over the mid SVC . The lung apices are not included on this radiograph . A retrocardiac opacity and small layering left pleural effusion are present . The appearance of the cardiac silhouette is unchanged .
    OUTPUT:
    
The a gastric tube is not visualized . Retrocardiac opacity and small layering left pleural effusion present .