Rather than going around the bush i suppose we can agree on the fact that those having xray let them carry it with them and those who dont have, the POE doesnt mindYou clearly stated earlier on that you have the CD of your x-ray. But you're reluctant to travel with it because you don't want to add to your luggage.
Considering the fact that the DV process is the actual basis of the visa you plan on using to enter the U.S., I would have thought it would make more sense for one to carry those items, especially the ones the embassy tells each applicant to take along, even if it's not checked at the POE.