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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RickLast replied to at October 25, 2015, 9:16 am

Is resolution increase with bandwidth?

StretchLast replied to at June 6, 2011, 7:00 pm

Got it! Thanks a lot again for hleipng me out!

PJLast replied to at June 13, 2009, 9:48 am

Only axial resolution increase with bandwidth

PJLast replied to at May 20, 2009, 1:43 pm

The bandwidth of a transducer is calculated by KLM model. For an array, calculated by acoustic stack of each element.

PJLast replied to at May 20, 2009, 1:42 pm

Rick: axial resolution increases with bandwidth. But the lateral decrease with it.

TTLast replied to at April 22, 2009, 2:49 pm

How is bandwidth calculated for a transducer? and in a linear array? Thanks

PJLast replied to at May 5, 2008, 12:20 pm

I would like to answer Jsutin's question:
The aperture is defined as the active area of transducer. For round single element transducer, the aperture is its diameter. For rectangle transducer, the beam is asymtery along two dimensions. And the aperure size is its width or length, depends on which dimension you want to calculate the beam.
For linear array, several elements work together, for example, maybe 32, and aperture size is 32*(element width = kerf). You may have noticed that pitch is the element width plus kerf size.

Is it helpful?

JustinJiLast replied to at May 5, 2008, 7:47 am

the aperture = the width or diameter of activated elements ?(such as medical array)
How about your understanding of "the ultimate lateral resolution is the pitch of element" and the applicaiton?(Why we need to make high density transducer array?)

BLLast replied to at April 22, 2008, 12:57 pm

Axial resolution: = pulse length/2;
lateral resolution = Fnumber * wavelength = Focal depth / apertuer diameter * wave length.

To achieve good axial resolution, short pulse is required. that is why wide bandwidth transducer is important.

JustinJiLast replied to at April 12, 2008, 9:33 pm

could you give a function about the relationship between frequency, axial resolution and lateral resolution?

BLLast replied to at November 13, 2007, 8:42 pm

The axial resolution increase with bandwidth but lateral resolution will decrease.