Multiple reflections in A-mode ultrasound imaging

[TSny]

Here is my full answer.. do you agree with me? Thank you

I agree with these. However, there is another case that you have missed.

 

[nao113]

I agree with these. However, there is another case that you have missed.

May I know what is it?

 

[TSny]

May I know what is it?

I don't want to give it away. It is not a very complicated path. Try playing around with various paths.

 

[TSny]

Yes, I just realized it will produced 38.4. is there any formula to recreate another anatomical configurations? Can you explain more about what should I have to do? Here, I tried another one, is it correct?

This will produce the echos at 34.5 μs and 69.0 μs. It will not produce the 73.2 μs echo unless the distance $l_3 = 0.32$ cm. But you already discovered that case.

What if you choose $l_2$ to be something other than 2.66 cm?
Can you choose it so that you get echos at 34.5 μs, 69.0 μs, and 73.2 μs and no other echos with arrival times less than about 75 μs?

 

[nao113]

I don't want to give it away. It is not a very complicated path. Try playing around with various paths.

Sure, I ll try to find other paths, thank you very much

 

[nao113]

View attachment 301701
This will produce the echos at 34.5 μs and 69.0 μs. It will not produce the 73.2 μs echo unless the distance $l_3 = 0.32$ cm. But you already discovered that case.

What if you choose $l_2$ to be something other than 2.66 cm?
Can you choose it so that you get echos at 34.5 μs, 69.0 μs, and 73.2 μs and no other echos with arrival times less than about 75 μs?

View attachment 301702

I see, I got it, I will try another distance which match with the given echoes, thank you so much