alt Hacker News> it's non-ionising
True, but ultrasound isn't entirely benign. Depending on what frequency and what power it can crack solid parts of the body (its used to break up kidney/gall stones) it also can heat things up (which is, assuming my understanding is correct, why doppler scans for blood flow are not done on <18 week pregancy)
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jkahrs595 • today at 11:21 AM
lasers can cut steel, so barcode scanners aren’t entirely benign
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The probes they're using are off the shelf probes used everywhere including on small animals, I don't see how you could compare that to a lithotripsy