Bedside Ultrasound Physics, Knobology and Artifacts

[@cnk7405]

The best video on basics of Ultrasound

[@elenal.9491]

I am very grateful you took the time to make this video. I am more confident and understand the knobology better.

[@kenrolt8072]

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!

[@drprincej]

Very very good video on Knobology and artifacts. Thank you for creating it.

[@MrVeer58]

Very useful with additional explanations.

[@kerithj6919]

As a clinician who trained 20 years ago this was really helpful. Can you recommend an ultrasound course for providers like myself?

[@MohammadYounos]

Thank you very much ! Great demonstration.

[@estherhavid4520]

Great video

[@samani75]

nice ....thanks for this good demonstration

[@meso7887]

VERY NICE DEMONSTRATION

[@winterpark02]

Excellent Teaching

[@sannybangun]

thank you for the video.

[@MikeAcousticMusic]

Thank you kindly!

[@DrRajinderKumarBajorianeera]

easy to learn & experiment

[@ubquitous1]

wow