What does bullous emphysema changes mean?

less lung: On chest x-ray or ct, there is less lung tissue seen (emphysema) with larger pockets of air in certain areas (bullous).

XR or CT: This diagnosis is specific findings seen in imaging only and can not be made on clinical basis alone. It means there are destroyed areas in the lung that cause coalescence of the walls of the alveoli and instead of small spaces, we see the big spaces or bags of air with less total surface area and by their sizes can push on other areas of the lungs.