Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Supine portable AP view of the chest was provided . A right IJ central venous catheter is seen with its tip residing in the expected location of the superior vena cava . Lung volumes are low . There is no definite sign of pneumonia or CHF . Mild retrocardiac opacity could represent a small degree of left lower lobe atelectasis . No pneumothorax or pleural effusion is seen . Cardiomediastinal silhouette is stable . Bony structures appear intact .
    OUTPUT:
    
Appropriately positioned right IJ central venous catheter . Mild left basal atelectasis .