Ultrasound Transducer Simulation Page
BioSono provides a cyberspace (www.biosono.com) where researchers, engineers, and students can find useful reference and educational materials, conduct acoustic simulation, post questions on design and development, and get answers. The online KLM based transducer acoustic stack simulation, which is currently free, can help you choose piezoelectric, matching and backing material, and a tuning electrical network. The output from the model includes electrical transmit impedance, acoustic receive impedance, and the impulse or pulse-echo response. The ultrasound beam profile simulation provides the calculated transmitted ultrasound pressure field under certain excitation for a given transducer aperture in a number of different geometrical configurations, including circular elements (flat and concave piston), rectangular elements, linear arrays, convex arrays, and 2D arrays. The simulation is based on Field II, which is a free program that utilizes the spatial impulse response method, and has been validated by many researchers for accuracy. In addition to the web based acoustic simulation, we also provide pulse-echo system, transducers, and customized design and develop services.
ultrasound beam simulation longitudinal view
ultrasound beam simulation cross view

You are welcome to the ultrasound discussion area. Your questions will be answered if they fall into the following categories:
  • Piezo-electrical material
  • Basic acoustic or ultrasound
  • Ultrasound imaging theory
  • Ultrasound transducer simulation, design and fabrication
  • Ultrasound beamforming architecture, algorithm, and related electronics.
  • Ultrasound transceiver, analog front-end.
  • Ultrasound imaging display algorithm

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AuthorPost
ZakLast replied to at December 20, 2015, 10:21 am

Hello..
This is my senior year project.
Basically i'm using two ultrasonic atomizers (1.65 MHz, 25 mm diameter)as a transmitter and a receiver and a blood sample in between,the signal will be transmitted through the blood sample till it reaches the receiver. As the blood sample coagulates (clotting), its viscosity will increase, thus the received signal will be attenuated gradually.

BUT... this is not happening!!! i'm sure that my setup is flawless, i have been working on it for 4 months.

The received signal have no particular pattern, in some experiments it increased, in others it decreased or just fluctuated randomly !! it is supposed to decrease (attenuate) gradually as the blood is clotting.

is it because i'm using atomizers ?? do they have different beam profiles than regular transducers?? aren't they suitable for such applications?? should i use a more focused transducer??
i'm using them because they are the only ones i could get.

PLEASE HELP ME..i only have 3 weeks till my seminar.
any help will be appreciated..thank you in advance.



SpikeLast replied to at June 6, 2011, 11:54 pm

That's 2 cleevr by half and 2x2 clever 4 me. Thanks!

pjLast replied to at May 13, 2010, 9:15 pm

You may need check:

1: Theoretically, how much dB the coagullated blood will attenuate ultrasound at 1.65MHz

2: Assume you are using a pulsed signal for transmit and receive, how is the trigger? Are you receiving signal from transmitter or they are just noise?

3: During the experiment, make sure the relative location of transmitter and receiver didn't change.

4: If you can confirm 2&3, you should be able to see the attenuation from blood.

Good luck.