3D - 2

Whats the difference betwwen a 3D and a 4D ultrasound?

I tol d people at work im going to get a 4D(cuz thats what the doctor said it was called) and them seemed to think i didnt know what i was talkign about. is there a differnce?

Public Comments

1. 3D is the still shot and 4D usually is the video version
2. The difference is the time. 4D ultrasound shows moving real-time 3D images as a video clip.
3. Yes, there's a difference. 2D: Just the vertical and horizontal dimensions. 3D: Horizontal, vertical, and axis z--basically, height, length, and width. The 4th dimension is time. So, it's a video instead of a photo. :) A rather physics-related approach to answering your question, but that's what it is! :)