Yay Wendy! In undergrad I worked in a u/s clinic so I can always make these things out, it's absolutely the head! =)
How are things otherwise? Apparently in Canada (at least our province) they now do 3d for standard u/s which wasn't the case previously- which is great because I now have 3d's for every pregnancy... I'm hoping your technician went over things with you at the end and showed you the baby, it'll be really amazing to see the progression as baby grows!