2.3 CXR Lung Anatomy

Question 1

Point out the major lung structures on the PA view of a CXR.

Answer 1

1. RUL and RLL - no clear division, usually about halfway through.
2. Costophrenic angles - should both be sharp
3. Trachea midline - follow down to the shadow of the carina
4. Cardiophrenic angles - should both be sharp

Question 2

Point out the major lung structures in a lateral view of the lung.

Answer 2

1. Retrosternal space
2. You can draw a diagonal line and ‘Y’ shape as shown, which helps to differentiate the lobes of the R lung.
3. The RUL and LUL are overlaid.
4. The RLL and LLL are overlaid.