Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . A right IJ central venous catheter is seen with its tip in the mid SVC region . Elevation of the right hemidiaphragm is increased from the prior CT . There is compressive atelectasis in the right lower lung . Left lung is clear . No pneumothorax . Cardiomediastinal silhouette appears grossly unchanged though the right heart border is obscured from view . Bony structures are intact .
    OUTPUT:
    
Elevated right hemidiaphragm , increased from prior . Right IJ central venous catheter positioned appropriately .