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The method know as 3d ultrasound is used in early pregnancy, it can provide 3d pictures of the unborn baby. Most of the time the ultrasound pictures are quickly collected and joined together and made into a movie to created a “4d ultrasound scan”.
Three dimensional scanning works similarly to the normal scanning methods except that the ultrasound waves are sent from multiple directions. The ultrasound waves are redirected back then captured to provide information to construct a 3d picture in in the same way as 3d pictures. 3 dimesional ultasound scanning was devised by olaf ramm abs stephen smith.
It is important to understand that sonologists all over the world always pictured 3d pictures of anatomy or pathology in their minds whilst doing 2d scans. However, until recently it was almost impossibel to do this type of reconstruction on on info using ultasound scanning. With the advent of baby scans for the first time allowed us a view into the thinking of a sonologist and hence letting us view the images on the ultrasound machine.
4d ultrasound 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 ultasound scanning, its use in non-medical situations needs to be undertaken with an understanding of the risks that may exist.
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