The method know as three dimensional ultrasound is used when a woman is in early pregnancy, it provides 3d pictures of the unborn baby. Most of the time these ultrasound samples are captured and joined together and animated to make a “4d ultrasound”.

Three dimensional scans works in the same way to the normal ultrasound methods except that the ultrasound scanning pulses can be directed from multiple directions. The ultrasound waves can be reflected back then captured to provide info to construct a 3d image in much the same way as 3d pictures. 3d ultasound scanning was started by stephen smith and olaf von ramm.

It’s important to understand that sonologists all over the world have always pictured 3d pictures of the body in their minds while doing 2d scans. However, until recently it was almost impossibel to do this kind of reconstruction on on data using ultasound scanning. With the advent of baby scans for the first time allowed us a view into the brain of a sonologist and so allowing us see the images on the ultrasound machine.

3d/4d imaging should utilize ultrasound energy following the same limits as conventional 2d ultrasound to create the 3d images. While there is no information of harm due to 3d ultrasound, its use in none medical situations needs to be undertaken with an understanding of the risks.

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