AP window Answer Key-

aorta (ascending, arch, descending and brachiocephalic branches)-green

main pulmonary artery-violet

AP window-red

left pulmonary artery-purple

right pulmonary artery-light blue

left atrial appendage-dark blue

 

lung abutting right hilar structures-yellow (NOT the AP window)

lung abutting left hilar structures-dark green (NOT the AP window)