On the left a patient with RB-ILD. The dominant feature is ground glass opacification and there are some thickened interlobular septa (arrow). Usually these patients will also have smoking induced centrilobular emphysema and there is some evidence that respiratory bronchiolitis is the precursor of emphysema. #Clinical #Radiology #CTChest #RBILD #RespiratoryBronchiolitis #ILD #RadiologyAssistant
