i just know they said my artery is goes down in size in the thoracic outlet and then goes back up in size once out of there. i asked about the vein and nerves but they said they cannot tell about nerves (don't show up on the can) but it is assumed that they are affected too. they said they don't look at vein cause it is not that good of a bench mark. so i guess i have atos and ntos? who knows.