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Fetuses Caught Yawning In 4D

Posted by timothy on from the amniotic-and-insomniac dept.

Rambo Tribble writes "Reuters reports 4D scans have conclusively shown that fetuses do yawn. Understandable, eh? After all, all they get is cable."

2 of 117 comments (clear)

  1. Re:4D? by dmbasso · · Score: 4, Informative

    It is supposed to mean it has height, width, depth and time.

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  2. Re:4D? by serviscope_minor · · Score: 4, Informative

    They're 2D images of 3D objects.

    Nope. Ultrasound gives complete depth measurements. So each time step is an (X,Y,Z) data cube (actually (theta,phy,time)->response ), where response is the magnitude of the received sound in the microphone. Therefore each elenment in the video is therefore the tuple (X, Y, Z, T)->some value, i.e. 4 dimensional.

    The video shown is just a projection, but ultrasound gives multiple depth readings, not just a single 2D manifold, so the raw data (obviously not the video here) is certainly 4D data.

    So yeah, ultrasound does provide full 4D data and the files are immense.

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