I have another ultrasound this Thursday and was wondering what they would do.? I had an ultrasound…

I have another ultrasound this Thursday and was wondering what they would do.? I had an ultrasound 12/21/15 and my doctor called the next day and asked me to go in again for another one because they couldn't see enough fluid around my baby girls spine. With this ultrasound will they be doing just pictures around baby girls spine or will the do a whole new ultrasound with profile an all.?