HIFU medical deviceMedtech
The simulation of medical devices is of very good help at the design stage in order to test various configurations, materials and operating conditions of the device to optimise its performances before to validate it with clinical test.
HIFU (High Intensity Focused Ultrasound) is a multiphysics challenge because it calls for acoustics and heat transfer simulations in the biological tissues of alive “materials” which are not easily defined like it can be for metallic or plastic parts.
Results and information extracted
In this example the medical device is a phased-array probe made of several piezoelectric elements, each activated with a delay calculated to reach a targeted volume and intensity of tissue treatment depending on frequency of the ultrasounds, geometrical configuration, etc. The simulation is used to compare dozens of configuration and choose one that will be further tested before manufacturing.
The ultrasounds are focused and optimised through simulation.
Acoustic wave focalisation
Top view of the probe containing one linear array of piezoelectric ceramics (black colour).
The piezoelectric transducers transmit vibrations and a propagated pressure wave through the biological tissues: they are ultrasounds visualised in blue and red.
Heat and localised coagulation
Visualisation of the energy provided in the focalised area: in yellow colour is where the temperature is the highest.
You can read an article inspired by this project on COMSOL’s blog to learn more about simulation of HIFU technology.
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