32 year old female with anomalous origin of the LPA from aorta pulmonary hypertension and Swyer-James syndrome 
CT in coronal projection shows a hyperlucent anterior segment of the right upper lobe   Note the patent segmental airway subtending the upper lobe If you look with an artistic aye you can see a bull made of soft tissues looking at the hyperlucent lung The patent segmental airway is the “eye of the bull”)                                                                                           Ashley  Davidoff MD TheCommonVein.net artery-off-aorta-014