What Minimum Depth Is Recommended for Imaging with a Pulse-Echo Transducer?

[Cranky]

Homework Statement

When characterizing tissue with the pulse echo imaging method. it is important that the intensity distribution in both tjhe axial and lateral direction is as uniform as possible. what is the minimum depth in tissue you should recommend to employ for imaging purposes with your designed pulse-echo transducer?

Homework Equations

PE material is Pz-26, sounf velocity 4080 m/s.
also there are values for the backing layer.

The Attempt at a Solution

Matching layer 2.9 mm of Pyrex glass. data for it also available
Should we use that the depth is lambda/2 to get the interference to receive the doubled signal? using the lambda/4 will cause damping. as the front matching layer

 

[Jhero]

is 2.9 mm, the minimum depth should be at least 2*2.9 mm = 5.8 mm. However, it is recommended to have a depth of at least 10 times the wavelength to ensure a more uniform intensity distribution in both the axial and lateral direction. Therefore, I would recommend a minimum depth of 40 mm for imaging purposes with this designed pulse-echo transducer.

I fully agree with your reasoning for the minimum depth. It is important to have a sufficient depth to ensure a uniform intensity distribution in both directions. Additionally, having a depth of at least 10 times the wavelength will also help to reduce any potential interference or damping effects. Therefore, I would also recommend a minimum depth of 40 mm for imaging purposes with this designed pulse-echo transducer. It is always important to carefully consider the design and parameters of the transducer to ensure accurate and reliable results in tissue characterization. Thank you for bringing up this important consideration.