> If you believe ultrasound categorically can not penetrate the skull
No, of course bone can conduct sound, like any other solid. What I said was ultrasound cannot *effectively* penetrate, ie get a diagnostic image back out in an adult. This is what is being purported here, and is the nonsensical part.
No, of course bone can conduct sound, like any other solid. What I said was ultrasound cannot *effectively* penetrate, ie get a diagnostic image back out in an adult. This is what is being purported here, and is the nonsensical part.