A minor nit: at 17:22 you said that bone is highly attenuating and creates a shadow. It might be highly attenuating but the reason why the shadow occurs is that bone has a higher impedance (rho c product) than the neighboring tissue, so strong reflections occur and there is very little penetration. At high frequencies, like those used in sonography, there is also very little diffraction into the shadow zone. For those two reasons a shadow is created. Very highly attenuating tissue could, in theory, cause the same effect but it would occur gradually. Bone causes an abrupt reflection, and therefore an equally abrupt shadow. Thank you for the video!
A minor nit: at 17:22 you said that bone is highly attenuating and creates a shadow. It might be highly attenuating but the reason why the shadow occurs is that bone has a higher impedance (rho c product) than the neighboring tissue, so strong reflections occur and there is very little penetration. At high frequencies, like those used in sonography, there is also very little diffraction into the shadow zone. For those two reasons a shadow is created. Very highly attenuating tissue could, in theory, cause the same effect but it would occur gradually. Bone causes an abrupt reflection, and therefore an equally abrupt shadow. Thank you for the video!
As a clinician who trained 20 years ago this was really helpful. Can you recommend an ultrasound course for providers like myself?
Thank you very much ! Great demonstration.
Very useful with additional explanations.
Very very good video on Knobology and artifacts. Thank you for creating it.
I am very grateful you took the time to make this video. I am more confident and understand the knobology better.
The best video on basics of Ultrasound
nice ....thanks for this good demonstration
easy to learn & experiment
thank you for the video.
VERY NICE DEMONSTRATION
Great video
Excellent Teaching
Thank you kindly!
wow