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Re:How I built the world's first 3D ultrasonic scanner by abductee_hg on Saturday May 08, 2021 @11:27PM (#27092973)
well, you sir, are the first. except maybe those lamers: https://en.wikipedia.org/wiki/Medical_ultrasound

:)

Re:How I built the world's first 3D ultrasonic scanner by vlovich123 on Sunday May 09, 2021 @12:28AM (#27093243)
The title in the submission is inaccurate & not actually the title of the article. The missing bit:

> that works in the air, using off-the-shelf components (< $100).