CT Pulmonary Angiography > Systematic Approach > Right Lung > Right Lower Lobe

Right Lower Lobe

6. Superior (apical) (A6) (Fig 3a,d,e in previous page) -- From the interlobar artery at about the same level as the middle lobe arteries and opposite their origin, find a posteriorly oriented branch(es) - A6a, A6b, A6c

7. Medial basal (paracardiac) (A7) (Fig 4a,b,c,d) -- From the basal trunk, go caudally and find a medially oriented branch - A7a, A7b *Note that an inconstant subsuperior pulmonary segment is sometimes seen, with arterial supply A* taking origin from the lateral aspect of the right basal trunk.

8. Anterior basal (A8) (Fig 4a,b,c,d) -- From the basal trunk, find an anteriorly oriented branch - A8a, A8b

9. Lateral basal (A9) (Fig 4a,b,c,d) -- From the basal trunk, find a laterally oriented branch - A9a, A9b 10. Posterior basal (A10) (Fig 4a,b,c,d,) - From the basal trunk, find a posteriorly oriented branch - A10a, A10b, A10c