17 week 4 days ultrasound - is it a boy?

I had an ultrasound yesterday at 17 weeks 4 days and the ultrasound tech told me she was certain that its a boy. But I am not sure what I am looking at. I asked her 4 times and she said she was certain it was a boy. We already have a boy but his ultrasound looked very clear. Your opinions are greatly appreciated.
http://i818.photobucket.com/albums/zz108/miks1975/BABY_6.jpg

[melimeli]

mmm I would keep your receipts.  I see 3lines and that means girl... I have 3 girls and they alll looked like that.. hmmm

[zazou]

It looks like a girl with the 3 lines, the same as in my ultrasound. Wait until the next ultrasound and see what that say then.

[Miks1975]

I dont know what to think. The pictures are really poor quality. When she showed me on the screen I could see the scrotum and his peepee but when I looked at the picture at home I couldnt so I am confused. Anyway, I have another ultrasound in a few weeks so I guess we'll see then. Just wanted to see what other people thought.